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?

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Solution

(a) 60 W -150 V power rating of appliance means, if the appliance is put in the circuit of 150 Volts, it will consume 60 W electrical power i.e, electric energy consumed by it in 1 second is 60 Joules.

(b) P = VI
∴ Current flowing through the appliance
I = $\frac{P}{V}$ = $\frac{60}{150}$ = 0.4 A

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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) 60 W -150 V power rating of appliance means, if the appliance is put in the circuit of 150 Volts, it will consume 60 W electrical power i.e, electric energy consumed by it in 1 second is 60 Joules. (b) P = VI ∴ Current flowing through the appliance I = PV = 60150 = 0.4 A

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?