Question

an electric fuse of1kw is opperated at 220v find which of the following fases the respectivelyrated at 1 A 3A and5A can be used it​

Answer 1

Data:

P = 1 kW = 1000 W

V = 220 V

We have to calculate the fuse that can be used for operating the electric iron.

Solution:

We know that,

I = P/E

Where, I is the current, P is the power and E is the electromotive force in volts.

Substituting the values, we get:

I = 1000/220

I = 4.54 A 

Rounding off the above value:

I = 5A

which shows that a fuse of 5 A can be used to operate the electric iron.

Hopefully it help