In the figure below, the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed v= 11.00 m/s. A resistor R = 0.4000 2 is connected to the rails at points a and b, which are directly opposite each other. The wheels make good electrical contact with the rails, so the axle, rails, and resistor form a closed-loop circuit. The only significant resistance in the circuit is R. A unifo magnetic field B = 0.0700 T is vertically downwards. (a) Find the induced current I in the resistor. A (b) What horizontal force F is required to keep the axle rolling at constant speed? N (c) Which end of the resistor, a or b, is at the higher electric potential? O Point a is at a higher potential. O Point b is at a higher potential. O Point a and Point b are at equal potentials. (d) After the axle rolls past the resistor, does the current in R reverse direction? O Yes O No Explain your answer.

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter27: Direct-current Circuits
Section: Chapter Questions
Problem 25P: In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly...
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In the figure below, the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed v = 11.00 m/s. A resistor R 0.4000 2 is connected to the rails at points a and b, which are
directly opposite each other. The wheels make good electrical contact with the rails, so the axle, rails, and resistor form a closed-loop circuit. The only significant resistance in the circuit is R. A uniform
magnetic field B = 0.0700 T is vertically downwards.
100
(a) Find the induced current I in the resistor.
A
(b) What horizontal force F is required to keep the axle rolling at constant speed?
N
(c) Which end of the resistor, a or b, is at the higher electric potential?
O Point a is at a higher potential.
Point b is at a higher potential.
Point a and Point b are at equal potentials.
(d) After the axle rolls past the resistor, does the current in R reverse direction?
Yes
No
Explain your answer.
Transcribed Image Text:= In the figure below, the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed v = 11.00 m/s. A resistor R 0.4000 2 is connected to the rails at points a and b, which are directly opposite each other. The wheels make good electrical contact with the rails, so the axle, rails, and resistor form a closed-loop circuit. The only significant resistance in the circuit is R. A uniform magnetic field B = 0.0700 T is vertically downwards. 100 (a) Find the induced current I in the resistor. A (b) What horizontal force F is required to keep the axle rolling at constant speed? N (c) Which end of the resistor, a or b, is at the higher electric potential? O Point a is at a higher potential. Point b is at a higher potential. Point a and Point b are at equal potentials. (d) After the axle rolls past the resistor, does the current in R reverse direction? Yes No Explain your answer.
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