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A 10 m long wire of resistance 20Omega i...

A 10 m long wire of resistance `20Omega` is connected in series with a battery of emf 3V and a resistance of `10Omega`. The potential gradient along the wire in volt per metre is

A

0.02

B

0.1

C

0.2

D

1.2

Text Solution

Verified by Experts

The correct Answer is:
C
Potential difference across the wire `=(20)/(30)xx3=2V`
Potential gradient `=(v)/(l)=(2)/(10)=0.2V//m`
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