Question

Please find the best way to get the answer

Answer 1

(1) Fuse is used as a safety device in circuit and is used in switch boards in domestics circuits

Answer 2

P=1kW=1000W
V=220V
P=V×I
=>I=P/V=1000/220=4.54
Since required current is greater than fuse rating, even though the device is not faulty the fuse will melt during the normal working of the device.