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Figure shows a potentiometer circuit for...


Figure shows a potentiometer circuit for comparision of two resistances. The balance point with a standard resistor `R=10.0Omega` is found to be 58.3 cm, while that with the unknown resistance X is 68.5 cm. the value of X is

A

`11.75Omega`

B

`12.55Omega`

C

`9.55Omega`

D

`12.75Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`(E_(1))/(E_(2))=(l_(1))/(l_(2)),(IR)/(IX)=(l_(1))/(l_(2))`
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