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MHT CET2008PhysicsAlternating Current

In an AC circuit the emf (e) and the current (i) at any instant are given respectively by array l e=E₀ t i=I₀ ( t- ) array The average power in the circuit over one cycle of AC is

Options

  1. AE₀ I₀ 2
  2. BE₀ I₀ 2
  3. CE₀ I₀ 2
  4. DE₀ I₀

Correct answer

C. E₀ I₀ 2

Step-by-step solution

Power = rate of work done in one complete cycle. Or P_ av = W T Or P_ av = (E₀ I₀ ) T / 2 T or P_ av = E₀ I₀ 2 where is called the power factor of an AC circuit.

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