An electrical appliance is rated as 60 W - 150 V.

(a) What do you understand by this statement?

(b) How much current will flow through the appliance when in use?

(a) If an electrical appliance is rated as 60 W - 150 V, it means if the appliance is put on a 150 V supply, it will consume 60 W electrical power (i.e., it will consume 60 J of electrical energy in 1 s).

(b) P = 60 W
V = 150 V

We know P = VI

∴ I = $\dfrac{\text{P}}{\text{V}}$ = $\dfrac{\text{60}}{\text{150}}$ = 0.4 A

So, current of 0.4 A will flow through the appliance when in use.