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Physics · PYQ NEET UG 2019(2)
हिन्दीA cycle wheel of radius \( 0.5\text{ m} \) is rotated with constant angular velocity of \( 10\text{ rad/s} \) in a region of magnetic field of \( 0.1\text{ T} \) which is perpendicular to the plane of the wheel. The e.m.f. generated between its centre and the rim is,
Correct answer · Option 3
0.125 V
Explanation
Induced e.m.f. between center and rim of a rotating disc is given by \( e = \frac{1}{2} B \omega R^2 = \frac{1}{2} \times 0.1 \times 10 \times (0.5)^2 = 0.125\text{ V} \).
