Question

when a potential difference of 2V is applied across the ends of a wire of 5M length a current of 1A is found to flow through it. Calculate:

1.the resistance per unit length of the wire.

2.the resistance of 2M length of the wire.

3.the resistance across the ends of the wire if it is doubled on itself.

Answer 1

When a potential difference of 2v is applied across a end of a wire of 5m length, a current of 1A is found to flow it. Calculate1. resistance per unit length= 0.4 ohm2. resistance of 2m unit length=0.8 ohm3. resistance across ends of the wire if is doubled on itself. bcoz resistance is directly proportional to length