Which one of the following is bigger unit of work?
Correct answer: D. Kilo watt hour
- A. 10 watt hour
- B. 10 electron volts
- C. Electron volt
- D. Kilo watt hour
Explanation
10 Wh = 10×3600 Ws = 3.6 ×104 J 10 eV = 10×1.6×10-19 J = 1.6×10-18 J 1 kWh = 3.6×106 J Hence, the correct option for the bigger unit of work is kilowatt-hour (kWh), as it represents a larger amount of energy compared to the other options.
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About Work and Energy
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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