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When current I flows through a wire, the...

When current I flows through a wire, the drift velocity of the electrons is v. When current 2I flows through another wire of the same material having double the length and area of cross-section, the drift velocity of the electrons will be

A

`(v)/(4)`

B

`(v)/(2)`

C

v

D

2v

Text Solution

Verified by Experts

The correct Answer is:
C
`v_(d)=(I)/(nAe), v_(d)^(.)=(2I)/((2A)n e)=v_(d)`
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Knowledge Check

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