Question

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

• A. 1 kW, 60 kJ
• B. 0.5 kW, 30 kJ
• C. 10 kW, 600 kJ
• D. None of these

Answer 1

Answer: (A)

1 kW, 60 kJ

Answer 2

Power $P = Vit = 250 \times 4 = 1000W = 1kW$

Energy= P × t = 1 kW × 60 sec = 60 kJ