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An accumulator of 4 V is connected throu...

An accumulator of 4 V is connected through a resistance of `30Omega` to a potentiometer wire 10 m long and resistance `30Omega`. When a cell is connected through a galvanometer to the potentiometer the null point is found at 5.5 m from the common terminal. The potential gradient in the wire is

A

`(1)/(15)"V"//"m"`

B

`(1)/(10)"V"//"m"`

C

`(1)/(5)"V"//"m"`

D

`(1)/(3)"V"//"m"`

Text Solution

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C
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