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A square metallic wire loop of side 0.1 ...

A square metallic wire loop of side `0.1 m` and resistance of `1W` is moved with a constant velocity in a magnetic field of `2wb//m^(2)` as shown in figure. The magnetic field 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?

A

1 cm/sec

B

2 cm/sec

C

3 cm/sec

D

4 cm/sec

Text Solution

Verified by Experts

The correct Answer is:
B
`R_("Total")=3+1=4Omega`
Induced current (i) = `(Blv)/R`
`rArr1xx10^(-3)=(2xx0.1xxv)/4`
`rArr4/2xx10^(-2)=vrArrv=2cm//sec`.
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