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The potential gradient along the length ...

The potential gradient along the length of a uniform wire is 20 volt/metre. B and C are the two points at 40 cm and 70 cm point on a meter scale fitted along the wire. What is the potential difference between B and C?

A

6 V

B

`0.4` V

C

`0.6` V

D

4 V

Text Solution

Verified by Experts

The correct Answer is:
A
6 V
Explanation K = 20 V/m
Two points at 40 cm and 70 cm point meter scale fitted along the wire . Let potential difference between B and C is E
`K = E/l =20 `V/m
` :. " " E=Kl =20 xx (0.70 -0.40)= 20 xx 0.3 = 6V`
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