A standard cell of 1.0185 V is used with a slide wire potentiometer. The balance was obtained at 60 cm. When an unknown emf was connected, the balance was obtained at 82 cm. The magnitude of unknown emf is

A standard cell of 1.0185 V is used with a slide wire potentiometer. T

1.	A standard cell of 1.0185 V is used with a slide wire potentiometer. The balance was obtained at 60 cm. When an unknown emf was connected, the balance was obtained at 82 cm. The magnitude of unknown emf is
A.	1.39 V
B.	0.75 V
C.	13.9 V
D.	7.45 V
Answer» B. 0.75 V