Question

Why we need a 5 A fuse for an electric iron which consumes 1 kW power at 220 V?

Answer 1

We need a fuse of 5A for an electric iron which consumes 1 kW power at 220 V. It is because:

Given P = 1000 W, V = 220 V

As we know, P = V × t

Or I = `"P"/"V"`

= `1000/(220"V")`

= 4.5 A

Hence, the fuse should be of 5 A.