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Question

A uniform but time varying magnetic field B=(2t3+24t)T is present in a cylindrical region of radius R=2.5cm as shown in figure. The direction of circular electric lines at t=1s is :
216028_ffa4695c483b41de8404a87e6b5abc16.png

A
clockwise
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B
anticlockwise
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C
no current is induced
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D
cannot be predicted
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Solution

The correct option is D anticlockwise
Magnetic field is increasing. Hence magnetic field is produced by a conducting circular loop placed there. For producing magnetic field induced current should be anti-clockwise. Direction of induced circular electric lines are also anti-clockwise.

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