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The rigid conducting thin wire frame car...

The rigid conducting thin wire frame carries an electric current I and this frame is inside a uniform magnetic field `vec B` as shown in Fig. 1.146. Then,

A

The net magnetic force on the frame is zero but the torque is not zero

B

The net magnetic force on the frame and the torque due to magnetic field are both zero.

C

the net magnetic force on the frame is not zero and the torque is also not zero.

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
b
As we know that
`vecF=oint Ivec(dl)xxvecB and vectau=vecMxxvecB`
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