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A potentiometer is connected across A an...

A potentiometer is connected across `A `and `B` and a balance is obtained at `64.0 cm`. When the potentiometer lead at `B` is moved to `C`, a balance is found at `8.0 cm`. If the potentiometer is now connected across `B` and `C`, a balanced will be found at

A

`8.0 cm`

B

`56.0 cm`

C

`64.0 cm`

D

`72.0 cm`

Text Solution

Verified by Experts

The correct Answer is:
B
`E_(1) prop 64`
`E_(1) - E_(2) prop 8`
`E_(2) prop l`
`:. 64 - l = 8` or `l = 64 - 8 = 56 cm`
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