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April 1, 2015

Search: an induced emf

Number of results: 532

Physics
1. How can voltage be induced in a wire? Can someone help me figure out an answer to this? please
November 1, 2007 by Michelle

Physics
The internal resistance of a dry cell increases gradually with age, even though the cell is not used. The emf, however, remains fairly constant at 1.5 V. Dry cells must be tested for age at the time of purchase by connecting an ammeter directly across the terminals of the cell...
February 12, 2008 by J

ap chemistry
Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I got .548733V Is this right?
October 21, 2010 by brian

physics question
The sum of the emfs and potential difference around a closed loop equals zero" is a consequence of: a) Newton's third law b) Ohm's law c) Newton's second law d) conservation of energy e) conservation of charge For this question: I had picked d conservation of energy but now I ...
March 28, 2007 by susane

physics
is increasing the current a valid method to increase the induced voltage when a magnet moves into a solenoid?
May 1, 2012 by hannah

medical coding
what codes are assigned for a patient admitted for an azathioprine 1 drug induced aplastic (initial encounter)?
May 18, 2014 by angela skinner

physics
Marks: 2 The emf produced in a generator is What is the frequency of rotation of the circular coil? Choose one answer. a. 100 Hz b. 60 Hz c. 50 Hz d. 25 Hz
June 9, 2011 by unknown

physics
A battery with an emf of 14.5 V and internal resistance of 0.83 Ω is connected across a load resistor R. If the current in the circuit is 0.81 A, what is the value of R?
April 1, 2013 by Ray

Criminal law
"self induced intoxication negates mens rea, hence no crime is committed" justify the statement.
February 18, 2008 by Timmy

physics
a mettallic rod of lenght l is rotated with speeed v in uniform magnetic field. find induced current if r is resistance.
June 19, 2011 by Rich

Physics
Thanks for any help :) Four 20 ohm resistors are connected in parallel and the combination is connected to a 20V emf device. The current is: A) 0.25A B) 1.0 A C) 4.0 A D) 5.0 A E) 100 E Parallel circuits: I know that the voltage is 20V and the Resistance is 20 V. So, I divided...
March 15, 2007 by susane

Chemistry 1202
calculate the Ph of the cathode compartment solution if the cell emf at 298 K is measured to be .6 V when Zn2+=.25M and PH2=0 .8 atm
November 25, 2012 by BMW

Physics
in a wire AB of uniform cross section in which a potential gradient of 0.1 V/m exist.If the balancing point is foung to be 180 cm from A then what is the Emf of the cell?
March 2, 2013 by Abhishek

Ap Chemistry
Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I kept getting .55V but it is wrong. Can someone please help me?
October 21, 2010 by brian

physics
A battery of emf and negligible internal resistance is connected to two resistances R1 and R2 in series. What is the potential difference across R2?(a)E(R1+R2)/R2(b)E(R1+R2)/R1(c)ER2/R1+R2(d)ER1/R1+R2
September 15, 2013 by john

College Physics
After 2.5 time constants, what percentage of the final voltage, emf, is on an initially uncharged capacitor C, charged through a resistance R?
September 16, 2014 by Van

Physics
When maximum power is transferred to an external resistor R by a battery of emf E and internal resistance r, the ratio of r/R is? Answer 1:1 Can some please explain? Thankkks!
November 2, 2014 by Ariana

Science-3 questions.
Which of the following best describes the climates of Europe and North America during the 1.8 million years of the Quaternary period? hot and dry cool and rainy periods followed by droughts warm and mild a series of ice ages followed by periods when the glaciers melted Which ...
December 11, 2013 by Princess Anna

physics
An 21.0 , 12.0 , and 5.0 resistor are connected in series with an emf source. The current in the 12.0 resistor is measured to be 4.00 A.
May 10, 2012 by dan

PHYSICS
What is the inductance of a coil if the coil produces an emf of 8.20 V when the current in it changes from -28.0 mA to +31.0 mA in 45.5 ms?
April 11, 2010 by JOSE

Physics
3) What is the emf of a battery with an internal resistance of 0.15 if the battery delivers 1.5 A to an externally connected 5.0 resistors?
June 12, 2014 by Anonymous

Physics
what current will flow through a resistance of 11 ohms when the emf impressed acrosss the resistance is 2.8 volts?
May 17, 2011 by Nilan

Chemistry
A cell has a standard emf of +0.177 V at 298 K. What is the value of the equilibrium constant for the cell reaction a) if n=1? b) if n=2?
April 8, 2013 by Summer

physics
A generator has a terminal voltage of 102V when it delivers 10.3 A, and 92 V when it delivers 31.9 A. Calculate the emf. Answer in units of V
June 2, 2013 by Anonymous

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery?
February 24, 2014 by mercedes

ECONOMICS AND DEVELOPMENT
Critically discuss various theory of underdevelopment.Is underdevelopment internally or external induced phenomenon.
September 27, 2010 by BERNICE

science
when a bar magnet is moved toward a stationary conducting loop which direction does the induced current in the loop flow?
June 9, 2011 by harold

physics
In the figure , the total resistance is 13.0 k \Omega, and the battery's emf is 32.0 V. If the time constant is measured to be 40.0 \mu s. Calculate the total capacitance of the circuit.
April 26, 2011 by Anonymous

Physics blehhhh
A 0.35 m2 coil with 50 turns produces a maximum emf of 45 volts in a magnetic field of 0.4 Tesla. What is the speed of rotation of the coil?
January 27, 2013 by anonymous

physical science
If the number of coils in the wire is doubled from 100 to 200, and the original rate of 2 times per second is kept the same, what will be the new voltage induced?
July 7, 2010 by somone

Advance Coding
how to code the following with POA indicator patient admitted for chemotherapy for an azathioprione I V58.11, 285.3 drug induced aplastic anemia 284.89/D61.1.
May 4, 2013 by Louise Bradley

science
a current can be induced in a closed circuit without the use of a battery or an electrical power supply by moving the circuit through a?
March 25, 2011 by Anonymous

physics
A battery has an internal resistance of 0.016 and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?
March 22, 2012 by Anonymous

Physics
A battery has an internal resistance of 0.017 and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?
February 23, 2013 by Don

medical coding
What are the ICD-9-CM codes for azathioprine drug induced aplastic anemia with peripheral neuropathy of multiple joints of the lower extremities secondary to severe rheumatoid arthritis
September 27, 2013 by Anonymous

physics
A solenoid of radius 2.30 cm has 380 turns and a length of 15.0 cm. (a) Find its inductance. (b) Find the rate at which current must change through it to produce an emf of 76.0 V
November 12, 2012 by Anonymous

Physics
A 0.35 m2 coil with 50 turns produces a maximum emf of 45 volts in a magnetic field of 0.4 Tesla. What is the speed of rotation of the coil? Can you show the steps too so I can understand? Thanks
January 28, 2013 by Anonymous

ap chemistry
Find the equilibrium constant for the reaction Cr(s) + Zn2+(aq)→Cr2+(aq) + Zn(s) if the standard cell emf is −0.76 V at the cathode and −0.91 V at the anode. RT - F= 0.025693 V
September 27, 2013 by Gabriella

Physics
Batteries are not perfect. Instead they have an "internal resistance, a catch all phrase which describes the internal chemical workings of the battery which prevents it from providing an unchanging voltage regardless ofnits load. A simple model of internal resistance attaches ...
March 9, 2008 by raks

Chemistry
Calculate the cell emf (in volts) for the following reaction at 25C: Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M) [Enter only the number of your answer.] Answer
November 15, 2010 by Diana

Chemistry
Predict the standard emf of each of the following galvanic cells. (a) Sn(s)|Sn2+(aq)||Sn4+(aq),Sn2+(aq)|Pt(s) (b) Pt(s)|Fe3+(aq),Fe2+(aq)||Ag+(aq)|Ag(s) I don't want the answer, I want the procedure/methods of how to do these types of problems.
June 21, 2013 by Sara

AP Chemistry
Calculate the standard cell emf for galvanic cells with the cell reaction 2H2(g) + O2(g)→2H2O(ℓ)in acidic solution. Answer in units of V
September 26, 2013 by Gabriella

physics
The rectangular coils in a 331 turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.95 T?
February 27, 2014 by rosita

physics
a storage battery of emf 8V internal resistance 1 ohm is being charged by a 12 V d.c source using a 15 ohm resistor in series in the circuit. Calculate the current
August 10, 2014 by mowgli

health
The eating disorder characterized by compulsive overeating followed by self-induced vomiting and the use of laxatives or diuretics is A. malnutrition. B. cirrhosis. C. anorexia nervosa. D. bulimia. i know that is C or D D is my guess right
August 27, 2008 by AK

physics
Assume the resistance values are R1 = 2,800 Ω, R2 = 1,500 Ω, R3 = 4,400 Ω, and the battery emf is 1 = 1.3 V.
May 23, 2013 by Anonymous

basic electrical engineering
a battery havibg an emf of E volt and internal resitance .1ohm is connected across the treminals A and B. Calculate the value of E inorder that the power dissipated in the 2 ohm resistoe is 2 watt
August 13, 2011 by Gisu

physics!
A battery has an emf of 8V and an internal resistance 2ohms. If it is connected to an external circuit that draws 6W of power, what is a possible current in the circuit? Please give me some ideas to do it! THANKS!
March 23, 2008 by Irena

Physics
A resitor of unknown resistance and a 35-omega resistor are connected across a 120-V emf device in such a way that an 11-A current flows. What is the value of the unknown reisistance?
April 10, 2011 by John - PLEASE Help!

Physics
A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.2 V when it is delivering 26.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?
February 16, 2015 by Jasmine

Science
An airplane traveling at 9.50 102 km/h passes over a region where Earth's magnetic field is 4.4 10-5 T and is nearly vertical. What voltage is induced between the plane's wing tips, which are 75 m apart? What's the formula for this question?
April 1, 2008 by Monica

physio
satiety would be induced by all of the following EXCEPT a. cholecystokinin b. naloxone c. morphine d.seratonin I know its not a or c, because those induce satiety. I'm stuck between b and c ...i think its b though
December 11, 2008 by Natash

physics
The electrical motor runs on a D.C source of emf E and internal resistance r. Show that power output of the motor is max where current drawn by the motor is E/2r.
March 16, 2010 by Edwin

Physics
A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.8 V. The electric power being dissipated by the internal resistance of the battery is 36 W. Find the emf of the battery.
February 18, 2013 by Anonymous

Physics
If the emf of a battery is 23 V and a current of 66 A is measured when the battery is shorted, what is the internal resistance of the battery? Answer in units of Ω How would you set up the equation to solve?
March 4, 2013 by Tiffany

history
the victory at yorktown in 1781: 1. ended the fighting in America 2. was solely the result of american arms 3. resulted from french control of the sea 4. induced george III to make peace promptly I think it is 4
September 13, 2008 by kyle

physics
A wire that is 0.86 meters long is moved perpendicularly through a constant magnetic field of strength 0.035 newtons/ampmeter at a speed of 6.0 meters/second. What is the emf produced?
December 20, 2013 by Anonymous

physic help
The magnetic flux through a coil of wire changes from 8 Txm ^2 to zero in a time 0.5 s. what is the magnitude of the average voltage induced in the coil during this change? please explain your answer..
December 12, 2010 by mash

physics
a battery with and emf of 12V and an internal resistance of 0.5 ohms, is connected in series to a resistor of 5.0 ohms. what is the terminal voltage (n V) of the battery?
April 12, 2010 by mandy

Physics
What is the emf of a battery with a 0.15 Ω internal resistance if the battery delivers 1.5 A to an externally connected 5.0 Ω resistor?
February 14, 2011 by Adam

Physics
A series combination of two resistors of resistance 12 and 8 is connected across a source of emf 24 V. What is the potential difference across 8 resistors? Do you know the formula for this?
January 24, 2013 by struggling student

ap chemnstry
What is the standard reaction free energy if the standard cell emf is 1.23? Faradays constant is 96485 C/mol. Answer in units of kJ/mol
September 26, 2013 by Gabriella

College Physics
The rectangular coils in a 201-turn generator are 14 cm by 17 cm. What is the maximum emf produced by this generator when it rotates with an angular speed of 525 rpm in a magnetic field of 0.81 T? I'm not sure what equations to use.
April 25, 2013 by Valerie

Science Physics
Calculate the time it takes for the voltage across the resistor to reach 11.0V after the switch is closed. the total resistance is 10.0kΩ , and the battery's emf is 27.0V . If the time constant is measured to be 34.0μs .
August 26, 2013 by Ti

physics
A 19 turn circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction of the Earth's magnetic field of 51.0 T, and then in 0.195 s it is flipped 180. An average emf of what magnitude is generated in the coil?
November 13, 2013 by Cassandra

thermodynamics and static machenics
For thermocouple,the value of C1 and C2 are 40.010^-6 v/c and -0.0110^-6 v/c^2 respectively.If the thermo emf between the junction is 2.310^-2 v and the cold junction is kept at the ice point,calculate the temperature of the hot junction.
March 22, 2015 by gourav

grammar
General endotracheal anesthesia was induced, and the patient was prepped and draped. prepositions and conjunctions and the = the conjunctions preposition = was prepped
July 5, 2009 by tina

Grammar
Can you help me with the Prepositions and Conjunctions in this sentence? General endotracheal anesthesia was induced, and the patient was prepped and draped. Prepositions: I am not sure. Conjunctions: and Thanks.
October 1, 2011 by Cindy

physics
if emf of a circuit is ddoubled and the resistance ofthe circuit is also doubled the current will : be doubled be reduced one-half remain the same
May 16, 2011 by Susmitha

mazin
2. How many cells connected in series, each having an EMF of 1.5 V and internal resistance of 0.2 Ω would be required to pass a current of 1.5 A through a resistance of 40 Ω.
December 11, 2014 by khalid

chemistry
Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V Can someone please help me? I have the equation: 2Cr +3Pb(+2) --> 2Cr(+3) + 3Pb
October 21, 2010 by Fred

agreement error
Patient was brought to the operating room, induced in general endotracheal anesthesia, and we then placed him in the supine position on the operating room table.
February 17, 2015 by rhonda

physics-quick question
If you have a rectangular loop of area A placed in a region where the magnetic field is perpendicular to the plane of the loop, than would the emf be zero because they are perpendicular?
April 16, 2008 by Jessica

physics
A moving rod is 12.0 cm long and moves with a speed of 15.0 cm/s. If the magnetic field is 0.800 T, calculate (a) the emf developed, and (b) the electric field in the rod. I got a)0.0132v and b).12v/m
October 9, 2010 by dude

Physics
A 50-cm wire placed in an East-West direction is moved horizontally to the North with a speed of 2 m/s. The Horizontal and Vertical components of the earth's magnetic field at that location are 25 T and 50T respectively. What is the emf between the ends of the wire? A) 30 V...
March 12, 2013 by Liz

scince@@@
i have to make a model for science fair. Any new development!. So please give me only idea that which new development can be possible with the help of eddy currents or induction of emf...........
September 28, 2013 by edward

CHEMISTRY HELP !!!!
a.) which of the following reactions should have the larger emf under standard conditions & why? CuSO4 (aq) + Pb (s) goes to PbSO4 (s) + Cu (s); Cu(NO3)2 (aq) + Pb(s) goes to Pb(NO3)2(aq) + Cu(s) b.) Calculate delta G for the reaction.
April 19, 2014 by Ali

physics
A flat loop of wire consisting of a single turn of cross-sectional area 8.10 cm2 is perpendicular to a magnetic field that increases uniformly in magnitude from 0.500 T to 1.90 T in 0.95 s. What is the resulting induced current if the loop has a resistance of 2.80 ?
November 13, 2013 by Cassandra

PHYSICS
A flat loop of wire consisting of a single turn of cross-sectional area 8.10 cm2 is perpendicular to a magnetic field that increases uniformly in magnitude from 0.500 T to 1.90 T in 0.95 s. What is the resulting induced current if the loop has a resistance of 2.80 ?
November 16, 2013 by Begging for help

Physics
An infinite straight wire carrying a current I=5 A flowing to the right is placed above a rectangular loop of wire with width w=11 cm and length L=27 cm, as shown in the figure below. The distance from the infinite wire to the closest side of the rectangle is h=1.7 cm. The ...
June 14, 2013 by Annoyingmous

Physics
An infinite straight wire carrying a current I=5 A flowing to the right is placed above a rectangular loop of wire with width w=11 cm and length L=27 cm, as shown in the figure below. The distance from the infinite wire to the closest side of the rectangle is h=1.7 cm. The ...
June 15, 2013 by Annoyingmous

Physics - Electromagnetism
An inductor in the form of a solenoid contains 440 turns and is 15.8 cm in length. A uniform rate of decrease of current through the inductor of 0.421 A/s induces an emf of 175 V. What is the radius of the solenoid?
August 16, 2012 by Robert

physics induced voltage
A Boeing 747 jet with a wingspan of 60.0 m is flying horizontally at a speed of 287 m/s over Phoenix, Arizona, at a location where the Earth's magnetic field is 50.2 T at 58.0 below the horizontal. What voltage is generated between the wingtips?
March 29, 2008 by Chris Adison

medical billing
What code(s) is/are assigned for a patient admitted for an azathioprine 1 drug- induced aplastic anemia (initial encounter)? The patient has peripheral neuropathy of multiple joints of the lower extremities secondary to severe rheumatoid arthritis
October 17, 2014 by virginia

physics
power supply has an open-circuit voltage of 39.0 V and an internal resistance of 2.00 . It is used to charge two storage batteries connected in series, each having an emf of 5.50 V and internal resistance of 0.300 . The charging current is to be 3.30 A.
March 6, 2012 by Anonymous

math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
March 11, 2014 by Jacob

math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
March 12, 2014 by Anonymous

Math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
March 13, 2014 by Anonymous

physics
A new "D" battery has an emf of 1.5 V. When a wire of negligible resistance is connected between the terminals of the battery, a current of 25 A is produced. Find the internal resistance of the battery. ________ Ω
January 26, 2011 by ali-1

physics
Problem 25.49 A 1.40-m-diameter MRI solenoid with a length of 2.80 m has a magnetic field of 2.50 T along its axis. Part A - If the current is turned off in a time of 1.2 s, what is the emf in one turn of the solenoid's windings? Express your answer using two significant figures
October 9, 2011 by Paige

physics
A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell with positive charge ...
February 10, 2012 by Mandaleigh

nursing
A physician orders dolasetron (Anzemet) 1.8 mg/kg IV for prevention of chemotherapy-induced nausea and vomiting. Dolasetron (Anzemet) is available in a 20 mg/mL vial. How many milliliters will be prepared and administered per dose to a 134-lb client? not to sure, please help
March 5, 2013 by linda

PHYSICS HELP
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis
April 8, 2014 by dan

Physics
A long, ideal solenoid has a diameter d=12cm and n=1200turns/meter carrying current I=20A. If the current is lowered at 4.33amp/s to zero, what is the magnitude of the induced electric field in V/m at a position 8.2cm from the solenoid's axis
April 9, 2014 by gary

chemistry
What is the strongest intermolecular force that occurs between carbon dioxide molecules? A. London dispersion forces B. Hydrogen bond C. Covalent bond D. Dipole-induced dipole attractions I think the answer is D but I am not sure
March 13, 2015 by Morgan

physics
Several light bulbs, each of resistance 1.5 Ω, are connected in a series across a 120 V source of emf. If the current through the circuit is 2 A, how many light bulbs are there in the circuit?
May 23, 2011 by ashley --- HELP PLEASEE!!!

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery? 800 Ω 900 Ω 400 Ω 600 Ω
February 24, 2014 by mercedes

physics
what is the difference in the induced current in a wire loop when a magnet goes through the loop north side first, south side first and sideways?
November 11, 2008 by sarah

Chem
Arrange the different types of forces in order of increasing energy. Covelant, Hydrogen bonding, Ion Dipole, Dipole-Dipole, Induced Dipole, and Ionic Bonding
December 4, 2012 by Jay

physics
A 30.343 V emf is placed across a series combination of three resistors (10 Ω, 15.632 Ω, and 64 Ω). At what rate is heat generated in the 15.632 Ω resistor? Answer in units of W
February 24, 2013 by emily

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