In an electric heater, $4\, A$ current passes for $1\, \text{minute}$ at a potential difference of $250\, V$. The power of the heater and the energy consumed will be, respectively:
- A$1\, kW, 60\, kJ$
- B$0.5\, kW, 30\, kJ$
- C$10\, kW, 600\, kJ$
- DNone of these
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