In figure the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed
Question:
In figure the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed v = 3.00 m/s. A resistor R = 0.400 ? is connected to the rails at points a and b, directly opposite each other. (The wheels make good electrical contact with the rails, so the axle, rails, and R form a closed-loop circuit. The only significant resistance in the circuit is R.) A uniform magnetic field B = 0.800 T is directed vertically downwards.
(a) Find the induced current I in the resistor.
(b) What horizontal force F is required to keep the axle rolling at constant speed?
(c) Which end of the resistor, a or b, is at the higher electric potential?
(d) After the axle rolls past the resistor, does the current in R reversedirection?
R b B
Step by Step Answer:
a As the rolling axle of length 150m moves perpendicularly to the uniform magnetic field an induced ...View the full answer
College Physics
ISBN: 978-0495113690
7th Edition
Authors: Raymond A. Serway, Jerry S. Faughn, Chris Vuille, Charles A. Bennett
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