A cell can be balanced against 110 cm an...

A cell can be balanced against `110 cm` and `100 cm` of potentiometer wire, respectively with and without being short circuited through a resistance of `10 Omega`. Its internal resistance is

2.0 ohm

zero

1.0 ohm

0.5 ohm

Text Solution

Verified by Experts

The correct Answer is:

Here, `l_(1)=110cm, l_(2)=100cm, R=10Omega`,
`r=((l_(1)-l_(2))/(l_(2)))R=((110-100)/(100))xx10=1.0Omega`

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