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A time varying magnetic field is present...

A time varying magnetic field is present in a cyclindrical region `R` as shown in the figure. A positive charge `q` is taken slowly from `P` to `Q` through `POQ`, the magnetic field varies with time as `B = B_(0) t` (where `B_(0)` is a constant) are directed into the plane of the paper. If `W` is the workdone then `W =`

A

zero

B

`B_0`

C

Infinite

D

`2B_0`

Text Solution

Verified by Experts

The correct Answer is:
A
In taking charge from P to Q one has to perform work against the force experienced by charge due the induced electric field. The induced electric field is perpendicular to line POQ and hence `W_1=0` .
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