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A potential difference of  is applied at the ends of a copper wire of length  and diameter . On doubling only , the drift velocity,

a)

Becomes two times

b)

Becomes half

c)

Does not change

d)

Becomes one-fourth



Question ID - 150275 | SaraNextGen Top Answer

A potential difference of  is applied at the ends of a copper wire of length  and diameter . On doubling only , the drift velocity,

a)

Becomes two times

b)

Becomes half

c)

Does not change

d)

Becomes one-fourth

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

As  is independent of area of cross-section hence drift velocity will not change, when diameter is doubled

127 votes


127