A P.D. of 2 volts exists across a potentiometer wire of length 4 m. When the P.D. across a `2 Ome
Channel: Doubtnut
Date: 2020-05-31

A P.D. of 2 volts exists across a potentiometer wire of length 4 m. When the P.D. across a `2 Omega` resistance of a second circuit is measured by this potentiometer, the balancing length is found to be 4 cm, the current in the second circuit is