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In a metre bridge experiment, the balanc...

In a metre bridge experiment, the balancing length from the left end is found to be 20 cm. If a standard resistance of 20 ohm is kept in the right gap, then the value of the unknown resistance in the left gap is

A

`5 Omega`

B

`10 Omega`

C

`15 Omega`

D

`7.5 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`(P)/(Q)=(20)/(80) therefore (P)/(20)=(1)/(4) therefore P= 5 Omega`
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