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Two wires A and B of the same material, having radii in the ratio 1 : 2 and carry currents in the ratio 4 : 1.

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

(a) 16 : 1 

(b) 1 : 16 

(c) 1 : 4 

(d) 4 : 1

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1 Answer

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Correct option: (a) 16 : 1

Explanation:

Current flowing through the conductor, I = n e v A. Hence

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