Question

The resistance of a 5m length of wire is 600 ohms. the length of the same wire when the resistance is 420 Ω

Answer 1

Answer:

Can't be solved.

Explanation:

Why? Because the area of that wire is not given here.

We know, R = dL/A (here d = density)

When you change the length. It also affects A (Area). [ Because the volume of that wire always remains the same]

But A is not specified in the question. So, this question has no valid answer.

Hope you have understood.