Energy Calculations | MCQs
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A. None of these
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B. 8J
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C. 32J
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D. 16J
Explanation
Kinetic Energy (K.E) = ½ × mass × velocity² = ½ × 2 × (4)² = 1 × 16 = 16J
The formula directly gives 16 joules for the given mass and velocity.
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A. 3.6 MJ
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B. 3.6 GJ
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C. 3.63J
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D. 3.6KJ
Explanation
1 kilowatt-hour (kWh) is equivalent to 3.6 million joules (MJ).
As it represents the energy used when 1 kilowatt of power is consumed for 1 hour.
- 1 kWh = 3.6 × 10⁶ J (3.6 MJ)
- 1 J = 1 watt-second
- 1 MJ = 10⁶ J
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