A metal rod of length \( 2 \mathrm{~m} \) is rotating with an angular velocity of \( 100 \mathrm...

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A metal rod of length \( 2 \mathrm{~m} \) is rotating with an angular velocity of \( 100 \mathrm{rad} / \mathrm{s} \) in a plane perpendicular to a uniform magnetic field of \( 0.3 \mathrm{~T} \). The potential difference between the ends of the rod is
(A) \( 30 \mathrm{~V} \)
(B) \( 60 \mathrm{~V} \)
(C) \( 40 \mathrm{~V} \)
(D) \( 600 \mathrm{~V} \)
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