In an electric heater $4\, amp$ current passes for $1$ minute at potential difference of $250\, volt$, the power of heater and energy consumed will be respectively
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a) Power $P = Vi\,t = 250 \times 4 = 1000\,W = 1\,kW$
Energy $= P \times t = 1\, kW \times 60 \,sec = 60\, kJ$
Energy $= P \times t = 1\, kW \times 60 \,sec = 60\, kJ$
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