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A potentiometer wire has length 10 m an...

A potentiometer wire has length 10 m and resistance `20Omega` . A 2. 5 V battery of negligible internal resistance is connected across the wire with an `80 Omega` series resistance. The potential gradient on the wire will be

A

`5 xx 10^(-5)V//mm`

B

`2.5 xx 10^(-4)V//cm`

C

`0.62 xx 10^(-4)V//mm`

D

`1 xx 10^(-5)V//mm`

Text Solution

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The correct Answer is:
A
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