When one joule of energy is consumed in one second, then the power used is said to be?

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ALP CBT 2 Physics and Maths Previous Paper 5 (Held On: 22 Jan 2019 Shift 2)
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  1. one watt
  2. one coulomb
  3. one volt
  4. one ampere

Answer (Detailed Solution Below)

Option 1 : one watt
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Detailed Solution

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CONCEPT:

  • Electric Power: The rate at which electrical energy is dissipated into other forms of energy is called electrical power i.e.,

Where V = Potential difference, R = Resistance and I = current.

EXPLANATION:

  • Mathematically power can be written as,

If, W = 1 J and t = 1 sec, then P = 1 watt

  • Thus the power of an electric circuit is said to be one watt or 1 ampere - volt if one joule of energy is consumed in one second. Therefore option 1 is correct.

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