Physics
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?
Household Circuits
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Answer
(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 = = = 0.4 A
So, current of 0.4 A will flow through the appliance when in use.
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