Question:medium
A conducting rod of length 50 cm, with one end pivoted, is rotated with angular speed of 60 rpm in a uniform magnetic field of 4.0 mT directed perpendicular to the plane of rotation of rod. Find the emf induced in the rod.
A conducting rod of length 50 cm, with one end pivoted, is rotated with angular speed of 60 rpm in a uniform magnetic field of 4.0 mT directed perpendicular to the plane of rotation of rod. Find the emf induced in the rod.
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For a rod rotating about one end in a magnetic field perpendicular to the plane of rotation,
\[
e=\frac{1}{2}B\omega l^2
\]
Always convert rpm into rad/s using
\[
\omega=\frac{2\pi N}{60}.
\]
Updated On: Jul 2, 2026
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