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Question 19

A conducting square loop initially lies in the $$XZ$$ plane with its lower edge hinged along the $$X$$-axis. Only in the region $$y \geq 0$$, there is a time dependent magnetic field pointing along the $$Z$$-direction, $$\vec{B}(t) = B_0(\cos \omega t)\hat{k}$$, where $$B_0$$ is a constant. The magnetic field is zero everywhere else. At time $$t = 0$$, the loop starts rotating with constant angular speed $$\omega$$ about the $$X$$ axis in the clockwise direction as viewed from the $$+X$$ axis (as shown in the figure). Ignoring self-inductance of the loop and gravity, which of the following plots correctly represents the induced e.m.f. ($$V$$) in the loop as a function of time:

image

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