Question

The resistivity of potentiometer wire is 40×10
−8
ohm - metre and its area of cross-section is 8×10
−6
m
2
. If 0.2 ampere current is flowing through the wire, the potential gradient of the wire is:
View solution​

Answer 1

Explanation:

cross-section is directly proportional to current

then let cross section be 10

So answer is 10*0.2 =2