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SSC Selection Post 2022 PYQ — Question 33

SSC Selection Post - Graduation Level - 8 Feb 2022 - Shift 3 • General Awareness • Q33

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Which of the following is a unit of energy?

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Correct answer: C

Explanation

The correct answer is option 3 i.e. kilowatt-hour.

Explanation:

Let's break down each option:

  1. Volt:  This is a unit of electric potential or voltage, not energy.

    • 1 volt = 1 joule/coulomb

  2. Joule/sec (J/s):  This is a unit of power, also known as a watt, not energy.

    • Power = Energy / Time

  3. Kilowatt-hour (kWh): This is a unit of energy.

    • 1 kWh = 1,000 watts × 3,600 seconds = 3.6 million joules

  4. Pascal: This is a unit of pressure, not energy.

    • 1 Pascal = 1 newton/meter²