A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10-9Ωm and the current passing through it is 0.5A and the cross sectional area of the wire is 10-8m2. Calculate the potential gradient along the potentiometer wire.

A potentiometer has uniform potential gradient. The specific resistanc

1.	A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10-9Ωm and the current passing through it is 0.5A and the cross sectional area of the wire is 10-8m2. Calculate the potential gradient along the potentiometer wire.
A.	0.5 × 10-9 V/m
B.	0.5 × 10-8 V/m
C.	0.5 × 10-1 V/m
D.	0.5 × 10-15 V/m
Answer» D.