Physics-
General
Easy
Question
A square metallic wire loop of side 0.1 m and resistance of 1
is moved with a constant velocity in a magnetic field of 2 wb/m2 as shown in figure. The magnetic field is perpendicular to the plane of the loop, loop is connected to a network of resistances. What should be the velocity of loop so as to have a steady current of 1mA in loop
- 1 cm/sec
- 2 cm/sec
- 3 cm/sec
- 4 cm/sec
The correct answer is: 2 cm/sec
Equivalent resistance of the given Wheatstone bridge circuit (balanced) is 3W so total resistance in circuit is 
. The emf induced in the loop 
.
So induced current 
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