Question

In the potentiometer circuit shown in the figure, the balancing length AJ=60 cm when switch S is open. When switch S is closed and the value of $R=50\Omega$ the balancing length AJ'=50 cm. The internal resistance of the cell C' is:

• A. $1.2\Omega$
• B. $1.0\Omega$
• C. $0.8\Omega$
• D. $0.6\Omega$

Answer 1

The correct option is B $1.0\Omega$