An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate:

(a) the power of the kettle.
(b) the energy transferred in 1 minute.

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Solution

(a) Power, P = VI = 230 $\times$ 10 = 2300 W
(b) Energy transferred in one minute = P $\times$ t
= 2300 W $\times$ 60 s (1 minute = 60 s)
= 138000 J
= 138 kJ

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An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate: (a) the power of the kettle. (b) the energy transferred in 1 minute.

(a) Power, P = VI = 230 × 10 = 2300 W (b) Energy transferred in one minute = P × t = 2300 W × 60 s (1 minute = 60 s) = 138000 J = 138 kJ

An electric kettle connected to the 230 V mains supply draws a current of 10 A. Calculate:

(a) the power of the kettle.
(b) the energy transferred in 1 minute.

(a) Power, P = VI = 230 $\times$ 10 = 2300 W
(b) Energy transferred in one minute = P $\times$ t
= 2300 W $\times$ 60 s (1 minute = 60 s)
= 138000 J
= 138 kJ