Question

A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm s⁻¹. The induced e.m.f. when the radius is 2 cm, is(a) 2πμV(b) πμV(c) $\frac{\pi}{2}\mu V$(d) 2μV

Answer 1

Answer:

Correct option (b) πμV Explanation: Here, Magnetic field, B = 0.025 T Radius of the loop, r = 2 cm = 2 x 10-2 m Constant rate at which radius of the loop shrinks, Magnetic flux linked with the loop is The magnitude of the induced emf is

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