Saturday
April 19, 2014

Search: magnetic field has magnitude

Number of results: 12,766

Physics
The other problems? Bainbridge mss spectrometer Magnetic Field of a current-carrying ribbon Second Rl circuit magnetic Field of a loop - Bz.
Friday, April 26, 2013 at 1:20pm by ind0

Physics
The other problems? Bainbridge mss spectrometer Magnetic Field of a current-carrying ribbon Second Rl circuit magnetic Field of a loop - Bz.
Friday, April 26, 2013 at 1:20pm by ind0

Physics
Suppose that the magnetic field o fthe Earth were due to a single current moving in a circle of radius 2988 km through the earths molten core. The strength of the Earths magnetic field on the surface near a magnetic pole is about 6.00E-5 T. About how large a current would be...
Sunday, October 23, 2011 at 11:56pm by Jessica

College Physics
A proton moves with a velocity of vector v = (6ihat - 1jhat + khat) m/s in a region in which the magnetic field is vector B = (ihat + 2jhat - 3khat) T. What is the magnitude of the magnetic force this charge experiences? answer in Newtons. I tried F=qvb but the vectors are ...
Saturday, March 10, 2012 at 1:48am by Anand

physics
A magnetic field is applied to the plain of a flat coil of copper wire. The time variation of the magnetic flux density is given by Bosinwt.At which of the following values of t is the magnitude of the emf induced in the coil a maximum.(a)T/8(b)3T/8(c)3T/4(d)T/2
Saturday, September 28, 2013 at 11:16am by Roy

physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ...
Tuesday, April 19, 2011 at 1:52pm by ok

physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ...
Tuesday, April 19, 2011 at 1:53pm by ok

physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ...
Tuesday, April 19, 2011 at 1:53pm by ok

physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ...
Tuesday, April 19, 2011 at 2:28pm by ok

physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ...
Tuesday, April 19, 2011 at 2:29pm by ok

physics
False. Excess charge generates an E (electric)field around the ball, but a B (magnetic) field is required to interact with a magnet. B fields are generated by currents or magnetic dipoles.
Friday, March 9, 2012 at 7:35am by drwls

physics
What is the direction of the force acting on a current-carrying conductor lying in a magnetic field? A. It is in a direction opposite to the direction of the magnetic field. B. It is at angles to the direction of the current. C. It is at right angles to both the direction of ...
Sunday, May 24, 2009 at 6:25pm by sally

Physics repost please check
Posted by Mary on Monday, November 5, 2007 at 8:19pm. A charged particle, passing through a certain region of space, has a velocity whose magnitude and direction remain constant. (a) If it is known that the external magnetic field is zero everywhere in this region, can you ...
Tuesday, November 6, 2007 at 11:48am by Mary

College Physics Homework. Please help!
A metal bar with a length of 0.30 m and mass of 0.5 kg is free to slide (no friction) on a set of vertical rails. The rails and bar together have a resistance of 500 ohms. The rails lie in a horizontal magnetic field with a strength of 0.04 T. The mass falls under the combined...
Monday, May 7, 2012 at 7:10pm by Rich

physics
Find the value of the magnetic field necessary to cause a proton moving at a speed of 2.50 10^3 m/s to go into a circular orbit of 15.5-cm radius. An electron has an energy of 100 eV as it enters a magnetic field of 3.50 10−2 T. Find the radius of the orbit. A ...
Sunday, July 24, 2011 at 1:35pm by Kayla

Physics
A charged particle with mass m, charge |q|=6.4 10−19C and speed v=3 106 m/s enters from the bottom of the figure and traces out the trajectory shown in the fields shown. The only electric field E=5 103 V/m is in the region where the trajectory of the charge is a ...
Saturday, April 27, 2013 at 4:38pm by tanvir ali

PHYSICS
A proton moves perpendicular to a uniform magnetic field B at 1.20 107 m/s and experiences an acceleration of 2.00 1013 m/s2 in the +x direction when its velocity is in the +z direction. Determine the magnitude and direction of the field.
Tuesday, October 29, 2013 at 1:02am by Kathy

physics induced voltage
I was given an equation by bobpursey but I dont know what it means. Considerable scientific work is currently underway to determine whether weak oscillating magnetic fields such as those found near outdoor power lines can affect human health. One study indicated that a ...
Sunday, March 30, 2008 at 8:39pm by Chris Adison

physics
Consider the process of charging a parallel plate capacitor with circular plates of radius R=5 cm separated by a distance d=0.2 cm. At some time t1, the capacitor is being charged with a current I=0.075 A. Consider a point P on the plane which is equally distant from the two ...
Friday, April 12, 2013 at 12:10am by dd

science
a region of magnetic force is known as a _______________ magnetic field. You could also be thinking of magnetic pole.
Wednesday, January 17, 2007 at 9:30pm by shaleem

Physics
Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.50 T. When viewed edge-on, the first surface is tilted at an angle of 14 from the horizontal, and a net magnetic flux of 8.70x10^-3 Wb passes through it. The same net magnetic flux passes ...
Sunday, October 20, 2013 at 10:15pm by Anonymous

College Physics
A proton moves perpendicular to a uniform magnetic field B at 1.20 107 m/s and experiences an acceleration of 2.00 1013 m/s2 in the +x direction when its velocity is in the +z direction. Determine the magnitude and direction of the field.
Friday, October 25, 2013 at 7:52pm by Suhani

physics
A conducting bar slides without friction on two parallel horizontal rails that are 50 cm apart and connected by a wire at one end. The resistance of the bar and the rails is constant and equal to 0.10 􀌛. A uniform magnetic field is perpendicular to the plane of the ...
Saturday, June 25, 2011 at 3:16am by Vlady

physics
At New York City, the earth's magnetic field has a vertical component of 5.2 10-5 T that points downward (perpendicular to the ground) and a horizontal component of 1.8 x 10^-5 T that points toward geographic north (parallel to the ground). What is the magnitude and direction ...
Tuesday, February 8, 2011 at 7:23pm by aml

Physics
Suppose that the current is created the magnetic field, that is similar to the magnetic field of the very long wire with the current. The magnetic field in this case according to the Biot-Savart Law is B=μₒI/2πr, then I =2πBr/ μₒ = 2π...
Wednesday, June 6, 2012 at 1:32pm by Elena

KUSSSESSS
Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of I = 0.50 A flowing north in the wire. (The rest of the circuit, which actually delivers this current, is not shown.) The Earth's magnetic field at this location has a ...
Wednesday, February 2, 2011 at 11:53pm by anip

PHYSICS
A proton moves perpendicular to a uniform magnetic field B at 1.20 107 m/s and experiences an acceleration of 2.00 1013 m/s2 in the +x direction when its velocity is in the +z direction. Determine the magnitude and direction of the field. T in the direction
Thursday, October 24, 2013 at 12:06am by smita

PHYSICS
A proton moves perpendicular to a uniform magnetic field B at 1.20 107 m/s and experiences an acceleration of 2.00 1013 m/s2 in the +x direction when its velocity is in the +z direction. Determine the magnitude and direction of the field. T in the direction
Saturday, October 26, 2013 at 6:20pm by smita

Physics
A solenoid with 200 turns and a cross sectional area of 60 cm^2 has a magnetic field of .60 T along its axis. If the field is confined within the solenoid and changes at a rate of .20 T/s, the magnitude of the induced potential difference in the solenoid will be: a) .00020V b...
Sunday, November 13, 2011 at 1:44am by Jasmine

Physics
A coil is made up of 19 square loops with the sides equal to 5.3 cm. The coil is placed in a uniform 350 mT magnetic field with the axis of the coil parallel to the magnetic field. If the field reverses direction in 0.17 seconds, what is in volts, the average emf induced in ...
Friday, March 11, 2011 at 10:00pm by Justin

Physics
An electron beam of a TV picture tube is accelerated through a potential difference of 2.00 kV. It then passes into a magnetic field perpendicular to its path, where it moves in a circular diameter of .360 m. What is the magnitude of the field? I am lost. I keep getting the ...
Monday, February 25, 2008 at 8:42pm by J

physics
according to Lenz's law, the magnetic field of an induced current in a conductor will a. enhance the applied field b. heat the conductor c. increase the potential difference d. oppose a change in the applied magnetic field i think D
Thursday, March 12, 2009 at 10:47pm by physics

Physics (please check)
Please let me know if my answers are not correct/not thorough enough. 1) Q:What happens when the number of loops in the armature of a generator is increased? 1) A:More loops= more voltage _________________________ 2) Q: Why does a piece of iron behave like a temporary magnet ...
Wednesday, June 4, 2008 at 2:27pm by BAdams

Physics
3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...
Tuesday, November 19, 2013 at 11:42am by James

Physics
3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...
Thursday, September 29, 2011 at 10:09pm by James

magnetism help
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
Friday, November 22, 2013 at 10:42am by Carl

physics
Two long, parallel conductors, separated by 14.0 cm, carry currents in the same direction. The first wire carries current I1 = 6.00 A, and the second carries I2 = 8.00 A Assume the conductors lie in the plane of the page. (a) What is the magnitude of the magnetic field created...
Tuesday, November 5, 2013 at 1:07am by taylor

Physics concept question
B: The current-carrying wire produces a magnetic field at the location of the charge. This magnetic field exerts a force on the charge.
Monday, March 7, 2011 at 2:10pm by Christina

physics numerical
an electron moving with the speed of 1067 m/s is passed into a magnetic field of intensity 0.1T normally.what is the radius of the path of the electron inside the field? if the strength of the magnetic field is doubled, what is the new radius of the path? (e/m=108*10611 C/kg)
Thursday, October 20, 2011 at 4:50am by brock

PHYSICS
A straight 1.2 m length iron rod is moved at 10 m/s through the earth's magnetic field at a location where it has magnitude 1.0 105 T. What is the magnitude of the induced emf between one end of the wire and the other end? What formula do I use?
Sunday, May 27, 2012 at 4:10pm by Pat

Physics
An electron moves with speed 2.46 x 105 m/s in a 1.39-T uniform magnetic field. At one instant, the electron is moving due west and experiences an upward magnetic force of 2.81 x 10−14 N. Caculate the magnetic field (angle). What is the direction of the magnetic field? ...
Thursday, March 1, 2012 at 8:43pm by Ashley

physics
A ^9 Be nucleus containing four protons and five neutrons has a mass of 1.5010−26 kg and is traveling vertically upward at 1.70 km/s. If this particle suddenly enters a horizontal magnetic field of 1.25 T pointing from west to east, find the direction of its ...
Wednesday, March 9, 2011 at 4:40pm by Becky

Physics
In designing a velocity selector that uses uniform perpendicular electric and magnetic fields, you want to select positive ions of charge +5e that are traveling perpendicular to the fields at 8.75 km/s. The magnetic field availabe to you has a magnitude of 0.550 T. (a) What ...
Monday, February 18, 2008 at 9:34pm by J

science
The question stinks. When net magnetic moments are aligned, the magnetic field is occuring. Before alignment, the magnetic moments are of random direction, and the overall net magnetic force is zero.
Saturday, February 12, 2011 at 7:38pm by bobpursley

PHYSICS
The magnetic field of the Earth at a certain location is directed vertically downward and has a magnitude of 54.0 T. A proton is moving horizontally towards the west in this field with a speed of 6.00 ✕ 106 m/s. What is the radius of the circular arc followed by this ...
Friday, November 1, 2013 at 12:16am by viper

Physics
A uniform magnetic field points north; its magnitude is 3.5 T. A proton with kinetic energy 6.0 10-13 J is moving vertically downward in this field. What is the magnetic force acting on it? This is what I've done. The answer is incorrect. Please help me find out why. 3.5T to...
Wednesday, September 22, 2010 at 8:19pm by Sar

physics
A 35 turn coil of radius 4.9 cm rotates in a uniform magnetic field having a magnitude of 0.53 T. If the coil carries a current of 20 mA, find the magnitude of the maximum torque exerted on the coil.
Friday, October 22, 2010 at 3:56am by chuck

Physics 2
A 45 turn coil of radius 5.1 cm rotates in a uniform magnetic field having a magnitude of 0.49 T. If the coil carries a current of 40 mA, find the magnitude of the maximum torque exerted on the coil.
Saturday, February 25, 2012 at 4:39pm by pierre

Physics
Can the magnitude of a magnetic field be negative? If we consider an electron in a mag field, using r=mv/qB, the negative charge on the electron gives a negative answer. Do I drop the minus sign?
Wednesday, February 25, 2009 at 3:43pm by charlie

physics-can anyone solve this please
3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...
Saturday, November 23, 2013 at 11:33am by Carl

Physics!!
An electromagnetic wave is produced by: A. an accelerating charged particle or changing magnetic fields B. an accelerating uncharged particle and changing magnetic fields C. a stationary charged particle and a magnetic field D. any moving particle and a magnetic field I think ...
Sunday, April 12, 2009 at 4:19pm by sophie

Physics
Q3 pls!!! A Bainbridge mass spectrometer is shown in the figure. A charged particle with mass m, charge |q|=4.8 10−19C and speed v=3 106 m/s enters from the bottom of the figure and traces out the trajectory shown in the fields shown. The only electric field E=9 103 V...
Friday, April 26, 2013 at 1:20pm by Anonymous

urgent physics
A power line carries a current of 110 A at a location where the Earth's magnetic field has a magnitude of 0.37 Gauss (0.3710-4 T) and points due north, very nearly parallel to the ground. Find the direction and magnitude of the magnetic force exerted on a 270 m length of the ...
Friday, November 4, 2011 at 3:40pm by sonia

Physics-I forgot the magnetic field calc
I forgot that the earth's magnetic field is 50 micro Tesla
Saturday, April 23, 2011 at 5:04pm by Russ

Physics
A long coaxial cable consists of two concentric conductors. The inner conductor is a cylinder with radius R_1, and it carries a current I_0 uniformly distributed over its cross section. The outer conductor is a cylindrical shell with inner radius R_2 and outer radius R_3. It ...
Friday, April 5, 2013 at 5:42am by Phy

physics
A Bainbridge mass spectrometer is shown in the figure. A charged particle with mass m, charge |q|=3.2 10−19C and speed v=3 10@6 m/s enters from the bottom of the figure and traces out the trajectory shown in the fields shown. The only electric field E=11 103 V/m is in...
Friday, April 26, 2013 at 11:18am by sat

Physics
You have arranged that the magnetic field in a particular region of space is due North with a value of 0.009 T. An electron enters the field traveling to the west with a speed of 0.09 of the speed of light. As a result, the electron experiences a magnetic force, which is ...
Monday, April 19, 2010 at 12:24am by Steve

physics
The picture tube in an old black-and-white television uses magnetic deflection coils rather than electric deflection plates. Suppose an electron beam is accelerated through a 53.8-kV potential difference and then through a region of uniform magnetic field 1.00 cm wide. The ...
Monday, April 4, 2011 at 9:52pm by joe

magnetism
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
Wednesday, November 20, 2013 at 2:22pm by Anton (Elena Pl: check)

Physics
A five-sided object, whose dimensions are shown in the figure, is placed in a uniform magnetic field. The magnetic field has a magnitude of 0.72 T and points along the positive y direction. Determine the magnetic flux through each of the five sides. picture can be found on ...
Saturday, October 19, 2013 at 1:57pm by Sarah

physics
A current I=2 Amperes flows in a circular single loop coil of radius R=10 cm. (a) Evaluate the magnitude of the magnetic field (in Tesla) at a point P on the axis of the coil, and a distance z =5 cm away from the plane of the coil itself. Now consider two N-turn circular coils...
Sunday, April 7, 2013 at 1:39pm by abdul rahman

Physics
Yes, because the magnetic field flux through current loops changes faster. The strength of the magnetic field stays about the same, because it is established by permament magnets or fixed-current electromagnets.
Wednesday, February 13, 2008 at 11:12pm by drwls

science
How large a current would a very long, straight wire have to carry so that the magnetic field 2 cm from the wire is equal to 1 G (comparable to the earths northward-pointing magnetic field)?
Monday, April 18, 2011 at 2:59pm by kamal

physics
One component of a magnetic field has a magnitude of 0.046 T and points along the +x axis, while the other component has a magnitude of 0.066 T and points along the -y axis. A particle carrying a charge of +7.50*10^-5 C is moving along the +z axis at a speed of 3.20*10^3 m/s...
Monday, February 26, 2007 at 11:26am by Anna

Physics..PLZ HELP!
The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is A) 3.0 ~ T. B) 1.5 ~ T. C) 1.5 ~ T. D) 3.0 ~ T. E) 3.0 ~ T.
Tuesday, March 5, 2013 at 7:39pm by April

PHYSICS
A 14 cm diameter circular loop of wire is placed in a 0.58 T magnetic field. (a) When the plane of the loop is perpendicular to the field lines, what is the magnetic flux through the loop? (b) The plane of the loop is rotated until it makes a 36 angle with the field lines. ...
Saturday, April 3, 2010 at 9:01pm by JOSE

physics
A 36 cm long copper wire carries a current of 6.0 A and weighs 0.45 N. A certain magnetic field is strong enough to balance the force of gravity on the wire. What is the strength of the magnetic field?
Thursday, March 7, 2013 at 12:58pm by Anonymous

physics
A 36 cm long copper wire carries a current of 6.0 A and weighs 0.45 N. A certain magnetic field is strong enough to balance the force of gravity on the wire. What is the strength of the magnetic field?
Sunday, March 10, 2013 at 10:09am by Jeff

physics 30
A current-carrying conductor that is 8.00x10^-2 m long is placed perpendicular to a magnetic field that has a strength of 6.00x10^-3 T. During a 3.00s time interval, 7.50x10^19 electrons pass a point in the conductor. The magnitude of the average magnetic force exerted on the ...
Wednesday, March 21, 2012 at 12:36am by sarah

Physics
A circular loop of wire with radius 0.0450 m and resistance 0.154 R is in a region of spatially uniform magnetic. The magnetic field is directed out of the plane. The magnetic field has an initial value of 7.89 T and is decreasing at a rate of -0.630 T/s. What is the rate at ...
Wednesday, February 29, 2012 at 7:33pm by Kyle

Physics
Question- A deflecting force is experienced by a charged particle entering a magnetic field. The deflecting force is always______ A. parallel to the magnetic field lines B. parallel to the motion of the charged particle C. perpendicular to both the motion of the charged ...
Thursday, April 19, 2012 at 11:36am by James Mesch

Physics
What is one way in which the magnetic field is similar to the electric field and one way in which the magnetic field is different from the electric field?
Wednesday, November 7, 2012 at 8:39pm by Tyler

Physics- magnetism
The four wires in the figure are tilted at 20degrees with respect to the field direction. Each carries a 4.5 current and is 0.35m long. What is the magnitude and direction of the force on each wire? (the answer is in terms of B-magnetic field) Image: h t t p: //p osti mage. or...
Monday, March 7, 2011 at 10:28am by Bob

AP Physics C
An electron follows a helical path in a uniform mag-netic field of magnitude 0.300 T. The pitch of the path is 6.00 um, and the magnitude of the magnetic force on the elec-tron is 2.00x10^-15 N. What is the electron's speed?
Monday, October 29, 2012 at 8:44pm by Michelle

IUP
A Circular metal loop is 28.0 cm in diameter. how large a current must flow through this metal so that the magnetic field at its center is equal to the earths magnetic field of 5.00*10-5T?
Wednesday, February 29, 2012 at 7:25pm by jenna

physics
Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.50 T. When viewed edge-on, the first surface is tilted at an angle of 11° from the horizontal, and a net magnetic flux of 8.20 10-3 Wb passes through it. The same net magnetic flux passes ...
Thursday, February 9, 2012 at 5:05pm by Anonymous

Physics
An aluminum wire with mass/unit length of p = 5*10^-4 kg/m lies on the ground, running east-west. The wire feels the earth's magnetic field, which has magnitude B = 5*10^-5 T. Assume the wire is in Columbia, where the Earth's magnetic field runs due north, parallel to ground. ...
Wednesday, November 28, 2012 at 7:59pm by Huy Nguyen

Physics
What must the charge (sign and magnitude) of a particle of mass 1.48g be for it to remain stationary when placed in a downward-directed electric field of magnitude 670N/C ? What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude...
Tuesday, September 3, 2013 at 7:17pm by Wayne

Electricity and Electronics
the magnitude of the voltage induce in a conductor moving through a stationary magnetic field depends on the
Thursday, June 15, 2006 at 11:44pm by amanda

PHYSICS
The magnetic field of the Earth at a certain location is directed vertically downward and has a magnitude of 54.0 T. A proton is moving horizontally towards the west in this field with a speed of 6.00 ✕ 106 m/s What is the radius of the circular arc followed by this ...
Saturday, November 2, 2013 at 4:51pm by bad at physics

physics
A horizontal rod with a length of 0.250 is mounted on a balance and carries a current. At the location of the rod a uniform horizontal magnetic field has a magnitude of 6.7010−2 and direction perpendicular to the rod. The magnetic force on the rod is measured by the ...
Monday, October 31, 2011 at 10:21pm by Andrea

Magnetic effect
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of 1. magnetic field...
Monday, November 25, 2013 at 1:11am by Mac URGENT Please

physics
You don't have to know what I2 is for that. You want the formula for the field at a dstance r = 0.005 m from wire 1. You can assume it has infinite length when you are that close to it compared to the length. Use Ampere's law and the right hand rule for the B field magnitude ...
Thursday, October 14, 2010 at 1:16pm by drwls

Physics--Current question
Two long straight parallel wires separated by 1.00mm carrying currents in opposite directions with current equaling 10.0A each. Find the magnitude and direction of the magnetic field at Point A which = 0.50mm, Point B = 0.50mm, and Point C=0.50mm and write the directions of ...
Monday, July 27, 2009 at 11:29am by MP

physics
A wire of length 0.655 m carries a current of 21.0 A. In the presence of a 0.470-T magnetic field, the wire experiences a force of 5.46 N. What is the angle (less than 90) between the wire and the magnetic field?
Tuesday, November 10, 2009 at 2:07am by Anonymous

Physics
1)A current-carrying conductor is kept at right angles to the direction of a magnetic field. What happens to the force acting on the wire if the strength of the magnetic field doubles? the force is doubled. 2)How much current is required to produce a force of 0.96 N on a 75 cm...
Friday, April 11, 2008 at 3:50pm by Jon

Physics
A proton, moving in negative y-direction in a magnetic field , experiences a force of magnitude F, acting in the negative x direction. a) What is the direction of the magnetic field producing force? b) Does your answer change if the word proton is replaced by electron? I get a...
Tuesday, October 25, 2011 at 8:27pm by Jessica

Physics
In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104-m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the magnitude of the earth...
Monday, April 8, 2013 at 3:20pm by Don

Physics - Electromagnetism
A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20 and increasing at the rate of 10/s, what is ...
Sunday, August 12, 2012 at 11:52pm by Robert

Physics
The northern magnetic pole of the Earth is really a south magnetic pole, if you define polarity on the basis of the magnetic field lines that emerge.
Thursday, April 10, 2008 at 11:16pm by drwls

physics
The current in the loop and magnetic field direction are connected according to the right hand rule: curl fingers to the direction of the current in the loop, the thumb points in the direction of magnetic moment of the loop that coincides with the direction of B. => The ...
Tuesday, December 17, 2013 at 3:57pm by Elena

physics
1.The earth is constantly bombarded by cosmic rays, which are charged particles from outer space. moving vertically Find the force on one such cosmic ray− a proton that is instantaneously downward at 5.04 107 m/s at a point outside the atmosphere over New York, where the...
Tuesday, February 23, 2010 at 7:23pm by Sandhya

Physics
In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104-m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the magnitude of the earth...
Tuesday, April 16, 2013 at 1:40pm by Anonymous

physics
A 0.330 kg bar is placed on a pair of frictionless rails separated by a distance of 1.60 m and located on an inclined plane that makes an angle of 29.0 with respect to the ground. The total resistance of the circuit remains at a constant 1.8 Ω and a uniform magnetic ...
Monday, August 20, 2012 at 7:36pm by Jimmy

Intro Physics
HI! Can you guide to which equation to use for this problem: An electron with the speed of 2 x 10^7 m/s enters a magnetic field with a velocity vector 25^0 away from the magnetic field direction. If it experiences an acceleration of 1.5 x 10^16 m/s^2, determine (absolute value...
Tuesday, March 2, 2010 at 11:17pm by John

Physics
If the EMF produced in a wire is 0.88 volts and the wire moves perpendicular to a magnetic field of strength 0.075 newtons/ampmeter at a speed of 4.20 meters/second, what is the length of the wire in the magnetic field?
Thursday, May 16, 2013 at 1:22am by Jake

Physics
Physics Question Please Help? A wire, 20.0 m long, moves at 4.0 m/s perpendicularly through a magnetic field. An EMF of 40V is induced in the wire. What is strength of the magnetic field?
Monday, February 28, 2011 at 12:11pm by Crystal

Physics
current is induced in the secondary side by a changing magnetic field. If one wants a continuous output, then the changing magnetic field has to continuously change, thus, alternating current.
Monday, May 28, 2012 at 11:04am by bobpursley

Physics pls help
the current in coil 2 will generate a magnetic field that opposes the magnetic field from coil 1. Use your right hand rules to figure out the direction of the current.
Monday, December 16, 2013 at 10:21pm by bobpursley

Physics grade 12
A horizontal beam of alpha particles are injected with a speed of 1.3x10^5 m/s into a region with a vertical magnetic field of magnitude 0.155T. A- How long does it take for an alpha particle to move half way through a complete circle? B- If the speed of the alpha particle is ...
Thursday, April 5, 2012 at 2:31pm by John

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members