Which is the biggest unit of energy:
Correct answer: D. kilowatt hour
- A. erg
- B. joule
- C. watt hour
- D. kilowatt hour
Explanation
1KWh=3.6 x 10^6J 1erg = 10-7J 1Wh = 3.6 x 10^3J 1kWh> 1Wh > 1J > 1erg
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Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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