Question

A 1.5m wire carries a 4 A current when a potential difference of 62 V is applied. What is the resistance of the wire?_______ ohms

Answer 1

According to Ohm's Law, the current is directly proportional to the potential difference between two points, or what we call voltage. The proportionality constant is the conductance, or reciprocal of resistance. In formula, it is written as:

I = V/R

Then,

R = V/I = 62 V/4 A = 15.5

The resistance is 15.5 ohms.