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An electron in potentiometer experiences...

An electron in potentiometer experiences a force `2.4xx10^(-19)N`. The length of potentiometer wire is 6m. The emf of the battery connected across the wire is (electronic charge `=1.6xx10^(-19)C`)

A

6V

B

9V

C

12V

D

15V

Text Solution

Verified by Experts

The correct Answer is:
B
`F=qE'`
`F=q.(V)/(l)`
`:.V=(F l )/(q)=(2.4xx10^(-19)xx6)/(1.6xx10^(-19))=9V`.
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