At a place the value of horizontal component of the earth's magnetic field \( H \) is \( 3 \time....

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At a place the value of horizontal component of the earth's magnetic field \( H \) is \( 3 \times 10^{-5} \mathrm{Weber} / \mathrm{m}^{2} \). A
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metallic rod \( A B \) of length \( 2 \mathrm{~m} \) placed in east-west direction, having the end \( A \) towards east, falls vertically downward with a constant velocity of \( 50 \mathrm{~m} / \mathrm{s} \). Which end of the rod becomes positively charged and what is the value of induced potential difference between the two ends?
(1) End \( A, 3 \times 10^{-3} \mathrm{mV} \)
(2) End \( A, 3 \mathrm{mV} \)
(3) End \( B, 3 \times 10^{-3} \mathrm{mV} \)
(4) End \( B, 3 \mathrm{mV} \)


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