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A square coil ABCD lying in `x-y` plane with its centre at origin. `A` long straight wire passing through origin carries a current `i=2t` in negative z-direction. The induced current in the coil is
image
A. clockwise
B. anticlockwise
C. alternating
D. zero

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Correct Answer - D
Magnetic lines are tangential to the coil as shown in figure. Thus net magnetic flux passing through the coil is always zero or the induced current will be zero.
image

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