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A small insect crawls in the direction o...

A small insect crawls in the direction of electron drift along bare copper wire that carries a current of 2.56A. It travels with the drift speed of the electron in the wire of uniform cross-section area `1mm^2`Number of free electrons for copper =`8 times 10^28// cc` and resistivity of copper = `1.6 times 10^-8 Omega m`
How much time would the insect take to crawl 1.0 cm if it crawls at the drift speed of the electron in the wire?

A

`10^-13sec`

B

`10^-15sec`

C

`10^-11sec`

D

`10^-8sec`

Text Solution

Verified by Experts

`t=m/(pNe^2)=(9.1 times 10^-31)/((1.6 times 10^-8 times 8 times 10^28 times 0.6 times 10^-19 j^2)) approx 10^-13 sec`.
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