Two wires \( A \) and \( B \) of the same material, having radii in...

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Two wires \( A \) and \( B \) of the same material, having radii in the ratio \( 1: 2 \) carry currents in the ratio \( 4: 1 \). The ratio of drift speed of electrons in \( \mathrm{A} \) and \( \mathrm{B} \) is
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