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Q: If you used 400 W of power for 30 h, you have used : यदि आप 400 वॉट की पॉवर को 30 घंटे तक उपयोग करते हैं तो कुल ऊर्जा खपत होगी?
  • A. 1.3 kWh
  • B. 13.3 kWh
  • C. 1.2 kWh
  • D. 12 kWh
Correct Answer: Option D - P = 400 watt समय = 30 घंटे तब कुल ऊर्जा = P × t = 400 × 30 = 12000 watt = 12 kWh
D. P = 400 watt समय = 30 घंटे तब कुल ऊर्जा = P × t = 400 × 30 = 12000 watt = 12 kWh

Explanations:

P = 400 watt समय = 30 घंटे तब कुल ऊर्जा = P × t = 400 × 30 = 12000 watt = 12 kWh