AIPMT PRELIMS 2010 Physics Induced EMF MCQ 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 emf when the radius is 2 cm is
2 μV
2 πμV
πμV
π/2 μV
Correct Answer
Detailed Explanation
The induced emf is calculated using Faraday's law of electromagnetic induction. The rate of change of area due to shrinking radius induces an emf.
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