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A square-shaped wire loop of mass m, res...

A square-shaped wire loop of mass m, resistance R and side 'a' moving with speed v0, parallel to the x-axis, enters a region of uniform magnetic field B, which is perpendicular to the plane of the loop. The speed of the loop changes with distance x `(x lt a)` in the filed, as

A

`v_(0)-(B^(2)a^(2))/(Rm)`

B

`v_(0)-(B^(2)a^(2))/(2Rm)`

C

`v_(0)-(B^(2)a)/(Rm)`

D

`v_(0)`

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The correct Answer is:
A
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