Number of results: 14,646
Physics
A -10 mC charge experiences a force of 75 N directed south. What is the electric field magnitude and direction at the location of the charge? If this charge is removed and not replaced, what is the electric field magnitude and direction at the location it used to occupy? I ...
Saturday, May 5, 2012 at 9:59am by Alaine'
College Physics
A charged cloud system produces an electric field in the air near Earth's surface. A particle of charge -2.1 x 10-9 C is acted on by a downward electrostatic force of 4.3 x 10-6 N when placed in this field. (a) What is the magnitude of the electric field? (b) What is the ...
Sunday, July 8, 2012 at 9:37pm by Stephanie22-41
phys
The ammonia molecule has a dipole moment of . Ammonia molecules in the gas phase are placed in a uniform electric field with magnitude 1.1×106 . What is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to ...
Wednesday, January 30, 2013 at 8:56pm by Anonymous
PhYSiCs
A -10 mC charge experiences a force of 75 N directed south. What is the electric field magnitude and direction at the location of the charge? If this charge is removed and not replaced, what is the electric field magnitude and direction at the location it used to occupy?
Friday, May 4, 2012 at 6:25pm by Allieeeeeeee:)
physics
PLEASE EXPLAIN A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 × 10−19 J as it moves. Find the magnitude of the charge on the ...
Tuesday, February 16, 2010 at 6:16pm by Jonathan
physics
A charge moves a distance of 1.4 cm in the direction of a uniform electric field having a magnitude of 244 N/C. The electrical potential energy of the charge decreases by 108.3 × 10−19 J as it moves. Find the magnitude of the charge on the moving particle. The ...
Friday, February 8, 2013 at 10:30am by EMily
Physics
An electron experiences a force of 12 mN in the positive x-direction in an electric field. What is the magnitude and direction of the electric field?
Tuesday, February 8, 2011 at 10:56pm by Sam
Physics
A point charge Q1=-2 microcoulomb is located at x=0, and a point charge Q2=+8 microcoulomb, is placed at x=-0.5 on the x axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,at various points along the x axis. a)What is electric ...
Monday, February 25, 2013 at 4:45am by Phy
physics
A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
Tuesday, January 17, 2012 at 10:39pm by Taylor
physics
A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at...
Tuesday, January 17, 2012 at 10:38pm by Taylor
Physics
please tell me where I went wrong. A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 5.0x 10^-23 kg m/s from 1.4x 10^-23 kg m/s in a time of 6.5x 10^-6 s. What is the magnitude of the ...
Friday, August 31, 2007 at 7:46pm by Mary
Physics
What is the magnitude of the electric field at a point midway between a -5.1 microC and a +6.1 microC charge 10cm apart? Assume no other charges are nearby. What is the direction of the electric field?
Friday, January 27, 2012 at 2:32pm by Mike
physics ( need answer very very soon pleaseeeee)
An electron enters the region of a uniform electric field between two oppositely charged parallel plates as shown, with an initial velocity of 3 x 106 m/s. The electric field between the plates is measured to be E = 200N/C. The horizontal length of the plates is 10cm. a. Find...
Friday, May 13, 2011 at 12:00am by billy
science
An electromagnetic field contains of both an electric field (which exerts a force on any charge) and a magnetic field (which exerts a force only on moving charges). Electric and magnetic fields are vector properties (having magnitude and direction of every point in space), but...
Thursday, December 31, 2009 at 2:35pm by drwls
physics
A small 8.00g metal ball is suspended by a 14.0cm long string in a uniform electric field of 1200 N/C [right] (like in question #20). If the ball has a charge of 3.5x10^-5 C, what angle will the string make in the electric field?
Saturday, May 11, 2013 at 11:27pm by HELP
Physics
A charged particle of mass 6.38x10^-31kg is suspended motionless in the air by an electric field. If the electric field is 7.52x10^-21 N/C downwards, what is the magnitude and sign of the charge of the particle?
Monday, January 30, 2012 at 9:22pm by Anonymous
PHYSICS
All answers are wrong. At least, if this were not multpile choice then, reasonably speaking, a teacher would have to mark any of the answers as "not correct". The reason why the charge spreads out uniformly is because a non uniform charge distribution gives rise to a...
Wednesday, April 8, 2009 at 1:26pm by Count Iblis
jphysics
the chapter is on electric fields and forces and I cannot figure these 3 answers out: Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks ...
Sunday, May 22, 2011 at 11:29am by Kelli Kenyon
physics
The drawing shows a uniform electric field that points in the negative y direction; the magnitude of the field is 4540 N/C. Determine the electric potential difference the following points VB − VA between points A and B VC − VB between points B and C VA &...
Saturday, January 15, 2011 at 5:33pm by Anonymous
Physics
A beam of electrons traveling with a speed of 3.00 x 107 m/s enters a uniform, downward electric field of magnitude 1.17 x 104 N/C between the deflection plates of an oscilloscope (the figure below ). The initial velocity of the electrons is perpendicular to the field. The ...
Tuesday, January 31, 2012 at 10:02pm by Ashley
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
physics
If a spherical shell has a uniform volume density of 1.84nC/m^3, inner radius a=.1m, outer radius b=.2m, what is magnitude of electric field at radial distances r=a, r=b, r=3b
Monday, February 6, 2012 at 5:47pm by amy
Physics
Two positive charges of magnitude q are each a distance d from the origin A of a coordinate system as shown above. ( Figure: h t t p : / / draw.to/DS0Qid) At which of the following points is the electric field least in magnitude? At which of the following points is the ...
Saturday, February 19, 2011 at 10:10pm by Amanda E.
College physics
150 pJ of energy is stored in a 1.0 cm times 1.0 cm times 1.0 cm region of uniform electric field. What is the electric field strength?
Wednesday, July 14, 2010 at 6:57pm by Emoni
Physics
q1= 25 pC q2 = -75 pC A) calculate the magnitude of the electric force between the two charges B) Is the force attractive or repulsive? C) calculate the magnitude and direction of E1 *( there is an arrow above E1) , the electric field at the orgin due to charge q1. D) ...
Tuesday, April 12, 2011 at 11:42am by Angela Britt
Physics
If a proton is released from rest in a uniform electric field does electric potential at its position increase, stay the same, or decrese?
Wednesday, February 24, 2010 at 1:31pm by Sara
Physics
If a proton is released from rest in a uniform electric field does electric potential at its position increase, stay the same, or decrese?
Tuesday, February 23, 2010 at 8:53pm by Anonymous
physics
A proton moves in a constant electric field E from point A to point B. The magnitude of the electric field is 4.2 x10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.18 m, what ...
Monday, April 23, 2012 at 5:23pm by Anonymous
physics
A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.50 m, ...
Thursday, February 16, 2012 at 1:27am by Daniel
Applied Physics
A proton moves in a constant electric field E from point A to point B. The magnitude of the electric field is 6.4 × 104 N/C; and it is directed as shown in the drawing, the direction opposite to that of the proton. If the distance from point A to point B is 0.50 m, what ...
Sunday, May 29, 2011 at 5:27pm by Anonymous
physics
A particle with a charge 7C and a mass of 20kg is traveling in a circular path around a fixed particle of charde -5C. The velocity is observed to be 3000m/sec. A 9C particle with the same velocity is instead in the presence of a uniform electric field of 250N/C as shown. What ...
Monday, December 20, 2010 at 1:22am by dipset
Physics
An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. A parallel-plate capacitor whose plates have area 0.109 m2 has a uniform electric field between its plates with the same energy density as the answer to part a. What is the ...
Thursday, July 1, 2010 at 3:50pm by Drew
Physics
One very long wire carries a current of 30A to the left along the x-axis.A second very long wire carries a current of 50A to the right along the line(y=0.280m,z=0) A)Where in the plane of the two wires is the total magnetic field equal to zero? B)A particle with a charge of -2...
Wednesday, November 11, 2009 at 2:48pm by Sandhu
Physics
An electron travelling in the same direction that an electric field points initially has a speed of 4.21 ×107 meters per second. If the electric field has a magnitude of 2.28 ×104 N/C, how far does the electron travel before stopping?
Thursday, June 7, 2012 at 4:21pm by John
Physics
A point charge (m = 1.0 g) at the end of an insulating string of length L = 46 cm (Fig. 16-66) is observed to be in equilibrium in a uniform horizontal electric field of E = 8800 N/C, when the pendulum's position is as shown in Fig. 16-66, with the charge d = 1.0 cm above ...
Monday, January 28, 2013 at 10:40am by kjipper
Physics
A small object, which has a charge q = 6.7 µC and mass m = 9.60 10-5 kg, is placed in a constant electric field. Starting from rest, the object accelerates to a speed of 2.06 103 m/s in a time of 1.03 s. Determine the magnitude of the electric field. Answer in N/C
Monday, January 28, 2013 at 1:36am by Jasmine
physics
a positive test charge of 3.0uC experiences a force of 0.75 N in an electric field. What is the magnitude of the electric field at the location of the test charge?
Saturday, March 23, 2013 at 4:31pm by alex
physics
a positive test charge of 3.0uC experiences a force of 0.75 N in an electric field. What is the magnitude of the electric field at the location of the test charge?
Saturday, March 23, 2013 at 12:36pm by alex
physics
A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45o with the field because the coil has made one-eighth of a ...
Friday, November 23, 2012 at 9:40pm by johnathan
Physics
A small m = 2.00 g plastic ball is suspended by a L = 24.0 cm long string in a uniform electric field, as shown in Figure P15.50. If the ball is in equilibrium when the string makes a 18.0° angle with the vertical as indicated, what is the net charge on the ball? The ...
Tuesday, February 1, 2011 at 7:04pm by Rachel
physics (electric field)
The drawing shows the potential at five points on a set of axes. Each of the four outer points is 6.2 x 10-4 m from the point at the origin. From the data shown, find the magnitude of the electric field in the vicinity of the origin.
Friday, January 18, 2013 at 9:07pm by help
physics
If the original electric field is 1.5x10^-4 N/C and the distance is reduced to one-half the original distance, what is the magnitude of the new electric field?
Wednesday, March 2, 2011 at 3:29pm by anonymous
physics
If the original electric field is 1.5 10-4 N/C and the distance is reduced to one-half the original distance, what is the magnitude of the new electric field?
Wednesday, March 2, 2011 at 3:28pm by anonymous
physics
In a certain region of space the electric potential is V= 5x-3x^2y+2yz^2. Find the expressions for the x,y,z compenents of the electric field in this region. What is the magnitude of the field at the point P, which has coordinates 1,0,-2)m? I dont know how to start this ...
Friday, February 29, 2008 at 12:23am by Jessica
physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8560 N/C. The mass of the water drop is 3.80 10-9 kg.
Saturday, January 22, 2011 at 9:48pm by Anonymous
physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8560 N/C. The mass of the water drop is 3.80 10-9 kg.
Saturday, January 22, 2011 at 9:44pm by Anonymous
Physics
A thin rod L = 9.0 cm long is uniformly charged and has a total charge of 4.4 nC. Find the magnitude of the electric field at a point P located at a distance R = 13.5 cm from the center of the rod when: (a) The point P lies along the axis of the rod Electric field =___kN/C (b...
Monday, July 9, 2012 at 11:11pm by Rain
Physics
need help with this problem :/ A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45o with the field because the coil has...
Sunday, October 28, 2012 at 6:13pm by derek
Physics
An alpha particle (charge +2e and mass 6.64 x10-27 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?
Sunday, March 10, 2013 at 12:09pm by Anonymous
Physics
An alpha particle (charge +2e and mass 6.64 x10-27 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?
Sunday, March 10, 2013 at 12:08pm by Anonymous
physics
Two 4.0-g spheres are suspended by 9.0-cm-long light strings (see the figure). A uniform electric field is applied in the x-direction. If the spheres have charges of −3. 10-8 C and +3. 10-8 C, determine the electric field intensity that enables the spheres to be in ...
Tuesday, December 20, 2011 at 5:58pm by ann
physics
At a certain distance from a point charge, the potential due to the charge is |5.93 V, and the magnitude of the electric field is 13.5 V/m. (Take the potential to be zero at infinity.) Is the electric field directed toward or away from the charge? Here is my attempt. ...
Monday, February 25, 2008 at 2:22am by Samantha
physics
Two point charges of the same magnitude but opposite signs are fixed to either end of the base of an isosceles triangle. The electric field at the midpoint M between the charges has a magnitude EM. The field directly above the midpoint at point P has a magnitude EP. The ratio ...
Thursday, February 14, 2013 at 5:19pm by shaun
physics
A particle has a charge of +2.2 μC and moves from point A to point B, a distance of 0.16 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy...
Wednesday, January 30, 2013 at 8:10pm by mageda
physics
Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric field at this location...
Saturday, May 21, 2011 at 10:39pm by Kelli Kenyon
physics
An electron and a proton are each placed at rest in an external uniform electric field of magnitude 520 N/C. Calculate the speed of each particle after 48 ns. None of the equations I have seem to help me. What can I use to solve this problem? I figured it out, but thanks anyway.
Thursday, April 12, 2007 at 7:49pm by Mischa
Physics
I had a two part question in which I'm fairly sure I did the first part correct, but part b I am unsure about. For part a, I had to determine the magnitude of the net electric field at the origin, which I got E= 1.7 X 10^7 N/C. Part b)if a point charge of 3 µC was ...
Monday, July 23, 2012 at 11:16am by Janah
physics
A force of 0.053 N is required to move a charge of 36 µ a distance of 30 cm in a uniform electric field. What is the size of the electric potential difference between the two points?
Thursday, January 12, 2012 at 9:47pm by tyler
Physics(Please Help!!)
Matt forgot to put the fabric softener in the wash. As his socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric field at this location...
Saturday, May 21, 2011 at 11:14pm by Kelli Kenyon
Physics
On a clear day, the Earth’s atmospheric electric field near the ground has a magnitude of 100 N/C and points vertically down. Inside the ground, the electric field is zero, since the ground is a conductor. Consider a mathematical box of 1.0 m x 1.0 m x 1.0 m, half below ...
Sunday, February 14, 2010 at 9:24pm by Amy
College
An electron enters the region of a uniform electric field, with v1=3*10^6 m/s and E=200N/C. The horizontal length of the plates is 0.100m 1. Fine the acceleration of the electron while in the field. 2. If the electron enters the field at a time t=0, find the time at which it ...
Sunday, April 22, 2012 at 9:26am by Tsoanelo
physics II
Two point charges of equal magnitude are 8cm apart. at the midpoint of the line connecting them, their combined electric field has a magnitude of 45 N/C.Find the magnitude of the charge.
Wednesday, April 13, 2011 at 3:43pm by ike
physics
A uniform electric field of magnitude 339 N/C is directed along the +y-axis. A 6.00 µC charge moves from the origin to the point (x, y) = (-40 cm, -33 cm).What is the change in potential energy associated with this charge ?
Wednesday, March 28, 2012 at 2:45pm by george
Physics
A uniform electric field of magnitude 336 N/C is directed along the +y-axis. A 5.30 µC charge moves from the origin to the point (x, y) = (-10 cm, -37 cm). (a) What is the change in the potential energy associated with this charge?
Sunday, January 23, 2011 at 4:01pm by christian
Physics
A rectangular surface (0.13 m 0.36 m) is oriented in a uniform electric field of 570 N/C. What is the maximum possible electric flux through the surface?
Thursday, August 30, 2007 at 4:31pm by Mary
physics
can anyone please help me on this one? A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.027 s, the normal makes an angle of 45 degrees with the field ...
Sunday, November 18, 2012 at 8:23pm by johnathan
Physics PLEASE HELP!
A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and a net charge of +6.5...
Monday, January 28, 2013 at 11:23pm by Adriana
Physics
A magnetic field has a magnitude of 1.2 10-3 T, and an electric field has a magnitude of 5.9 103 N/C. Both fields point in the same direction. A positive 1.8 µC charge moves at a speed of 2.9 106 m/s in a direction that is perpendicular to both fields. Determine the ...
Thursday, September 27, 2007 at 10:45pm by Mary
Physics
An electrostastic force of 20.0 newtons is exerted on a charge of 8.00 x 10^/2 C at point P in an electric field. The magnitude of the electric field strength at P is Given: Fe = 20 B q = 8.00 x 10^/2 C
Friday, February 5, 2010 at 5:05pm by Priscilla
physics
A proton moves at 3.60 *10^5 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 8.20* 10^3 N/C. Find the time interval required for the proton to travel 4.00 cm horizontally. thanks
Sunday, March 27, 2011 at 12:29pm by Rachel
physics
A proton moves at 3.60 *10^5 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 8.20* 10^3 N/C. Find the time interval required for the proton to travel 4.00 cm horizontally. thanks
Sunday, March 27, 2011 at 11:17am by Rachel
Physics
A cube is located with one corner at the origin of an x, y, z, coordinate system. One of the cube's faces lies in the x, y plane, another in the y, z plane, and another in the x, z plane. In other words, the cube is in the first octant of the coordinate system. The edges ...
Monday, September 24, 2007 at 10:11pm by Mary
Physics
An electron travels at a speed of 1.0×104 through a uniform magnetic field whose magnitude is 1.2×10−3 . What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field are perpendicular?
Monday, November 1, 2010 at 3:43pm by Lisa
Physics
The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the acceleration due to the Earth’s ...
Monday, August 10, 2009 at 10:10pm by Sammy
electric
When an electron moves from A to B along an electric field line in Fig. 24-29, the electric field does 3.66 x 10-19 J of work on it. What are the electric potential differences (a)VB - VA, (b)VC - VA, and (c)VC - VB? in the picture there r four field lines going from down to ...
Tuesday, April 14, 2009 at 7:49am by sweety
physics
A dipole consists of two charges +q and -q, held apart by a rod of length s, as shown in the diagram. If q = 9 nC and s = 2 mm, what is the magnitude of the electric field due to the dipole at location A, a distance d = 5 cm from the dipole? E=____N/C What is the magnitude of ...
Saturday, February 6, 2010 at 10:19pm by LC
physics
A Van de Graaff generator is charged so that the magnitude of the electric field at its surface is 2.4 104 N/C. (a) What is the magnitude of the electric force on a proton released at the surface of the generator? (b) Find the proton's acceleration at this instant.
Friday, February 5, 2010 at 9:21pm by carla
Physics
An electric generator contains a coil of 100 turns of wire, each turn forming a rectangular loop 50cm by 30cm. The coil is placed entirely in a uniform magnetic field with magnitude, B = 3.5T and direction initially perpendicular to the coil's plane. What is the maximum ...
Wednesday, November 24, 2010 at 12:31pm by Ri
physics
A magnetic field has a magnitude of 1.20 10-3 T, and an electric field has a magnitude of 5.50 103 N/C. Both fields point in the same direction. A positive 1.8-µC charge moves at a speed of 2.60 106 m/s in a direction that is perpendicular to both fields. Determine the ...
Tuesday, February 8, 2011 at 10:04pm by aml
Physics
There is a very large horizontal conducting plate in the x−y plane (consider it infinitely large). Its thickness is h. The charge densities on the upper and the lower surfaces are both equal to +σ. What is the magnitude of the electric field? Express your ...
Thursday, February 21, 2013 at 3:45am by Anonymous
Intro T Electrical Engineering
A solid metal sphere with radius 0.430{\rm m} carries a net charge of 0.210{\rm nC} . Find the magnitude of the electric field at a point 0.112{\rm m} outside the surface of the sphere. Find the magnitude of the electric field at a point inside the sphere, 0.112{\rm m} below ...
Tuesday, September 18, 2012 at 3:25pm by Habib. L
math/physics
A Van de Graaff generator is charged so that the magnitude of the electric field at its surface is 3.0 multiplied by 104 N/C. (a) What is the magnitude of the electric force on a proton released at the surface of the generator? (b) Find the proton's acceleration at this ...
Monday, January 11, 2010 at 9:57pm by jake
math/physics
A Van de Graaff generator is charged so that the magnitude of the electric field at its surface is 3.0 multiplied by 104 N/C. (a) What is the magnitude of the electric force on a proton released at the surface of the generator? (b) Find the proton's acceleration at this ...
Monday, January 11, 2010 at 8:39pm by jake
Physics
An alpha particle (helium nucleus, charge +2e) starts from rest and travels a distance of 1.88 cm under the influence of a uniform electric field of magnitude 12.2 kV/m. What is the final kinetic energy of the alpha particle?
Wednesday, February 1, 2012 at 8:45pm by Ashley
college physics
The electric field near the surface of a uniformly charged conducting plane can be determined by Gauss's law. If the plane is a square of sides 11.5 cm and carries a charge of 22.0 nC (that's nanocoulombs), what is the magnitude of the electric field near the surface?
Sunday, January 24, 2010 at 9:30pm by Aly
walter
A positive charge of 1.5x10^-8 C experiences a force of 0.025 N to the left in an electric field. What are the magnitude and direction of the field?
Thursday, March 8, 2012 at 1:15pm by george
Physics - urgent
I already asked this and was given an answer, but I don't fully understand it and so would like a further explanation. What I asked was... An electron is accelerated through a uniform electric field of magnitude 2.5x10^2 N/C with an initial speed of 1.2x10^6 m/s parallel ...
Tuesday, April 21, 2009 at 9:38pm by Linn
PHYSICS
An electric dipole has its dipole moment paligned with a uniform external electric field E(a)Is the equalibrium stable or unstable ?(b)Discuss the nature of the equilibrium if Pand E point in opposite directions?
Wednesday, June 18, 2008 at 4:28pm by aman
physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 12300 N/C. The mass of the water drop is 4.71 × 10-9 kg. How many excess electrons or protons reside on the drop?
Monday, February 25, 2013 at 11:16am by natasha
Physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8380 N/C. The mass of the water drop is 3.40 10-9 kg. How many excess electrons or protons reside on the drop?
Tuesday, March 29, 2011 at 9:32pm by Anonymous
Physics
A proton is released from rest in a uniform electric field which is directed along the x axis and of magnitude E=2*10exponent5 V/m.The proton undergoes a displacement from point A at the origin to point B at x=0.2m.What is the change in the potential energy of the proton ...
Monday, January 17, 2011 at 1:30pm by Joel
physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8000 N/C. The mass of the water drop is 3.54 10-9 kg How many excess electrons or protons reside on the drop?
Saturday, January 8, 2011 at 6:38pm by michelle
physics
The potential difference between the accelerating plates of a TV set is about 30 kV. If the distance between the plates is 1.1 cm, find the magnitude of the uniform electric field in the region between the plates. (in N/C)
Thursday, May 17, 2012 at 4:06pm by andrew
physics
an elecrton is placed in a uniform electric field of 232 n/c charge. if the electron is at rest at the origin of t=0 and the field is in the positive direction, what are the x and y coordinates of the electron at t=2.3 ns
Wednesday, January 16, 2008 at 4:34pm by michelle
PHYSICS PLEASE HELP!
Suppose an electron is released from rest in a uniform electric field whose magnitude is 4.70 103 N/C. (a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this...
Wednesday, March 17, 2010 at 7:55pm by James
physics
A uniform electric field E in the x-direction is produced by an appropriate charge configuration. A thin sheet of charge s per unit area is placed perpendicular to the x-direction at x = 0. If the initial charge configuration is assumed to be undisturbed by the presence of the...
Wednesday, June 17, 2009 at 7:19am by Sandhya
Physics
A 10 charge sits at a point in space where the magnitude of the electric field is 1900 .What will the magnitude of the field be if the 10 charge is replaced by a 20 charge?
Thursday, March 29, 2012 at 2:32pm by Frustrated
physics
A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0840 T, it produces a Hall voltage of 0.660 µV. When it is used to measure an unknown magnetic field, the Hall voltage is 0.360 µV. What is the ...
Tuesday, April 5, 2011 at 10:01pm by Rachel
Physics
A long cylindrical insulator has a uniform charge density of 1.0 #C/m3 and a radius of 9.0 cm. a) What is the electric field inside the insulator at a distance of 4 cm? b) What is the electric field at 17 cm? c) How much work must you do to bring a q = 0.05 #C test charge from...
Saturday, March 10, 2012 at 12:08pm by Fatima
physics
2) A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 8.6 x 10^-23 kg·m/s from 2.4 x 10^-23 kg·m/s in a time of 5.7 x 10^-6 s. What is the magnitude of the electric field? 3) A ...
Thursday, September 14, 2006 at 12:18pm by Kevin
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