(a) What is the meaning of electric power of an electrical device? Wri

1.	(a) What is the meaning of electric power of an electrical device? Write its Sl unit.(b) An electric kettle of 2kW is used for 2h. Calculate the energy consumed in (i) kilowatt hour and (ii) joules
Answer» (a) Electric power is the rate at which work is done or energy transformed into an electric circuit. SI unit - Watt (b) (i) \(Power = \frac{Energy}{Time}\) Energy = Power x Time Energy = 2 x 2 E = 4KWH (ii) In joule E = 4 x 3.6 x 10⁶J E = 12.56 x 10⁶ J

(a) What is the meaning of electric power of an electrical device? Write its Sl unit.(b) An electric kettle of 2kW is used for 2h. Calculate the energy consumed in (i) kilowatt hour and (ii) joules

Answer»

(a) Electric power is the rate at which work is done or energy transformed into an electric circuit.

SI unit - Watt

(b)

(i) \(Power = \frac{Energy}{Time}\)

Energy = Power x Time

Energy = 2 x 2

E = 4KWH

(ii) In joule

E = 4 x 3.6 x 10⁶J

E = 12.56 x 10⁶ J

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(a) What is the meaning of electric power of an electrical device? Write its Sl unit.(b) An electric kettle of 2kW is used for 2h. Calculate the energy consumed in (i) kilowatt hour and (ii) joules

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