An electric fuse of rating 3A is connected in a circuit in which an electric iron of power 1kW is connected; which operates at 220V. What would happen? Explain.
Here, P = 1 kW = 1000 W, V = 220 V
This current is greater than the rating of the fuse (i.e. 3A). Hence, the fuse will melt and the circuit breaks. Therefore, electric iron will not work.