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NEETPhysicsAlternating Current

The standard household alternating current (AC) supply in India is rated at 220 V . What is the peak voltage of this supply?

Options

  1. A155 V
  2. B311 V
  3. C220 V
  4. D440 V

Correct answer

B. 311 V

Step-by-step solution

The voltage rating given for an AC supply always represents its root mean square (RMS) value. Therefore, the RMS voltage is V_ rms = 220 V . The relationship between the peak voltage ( V₀ ) and the RMS voltage for a sinusoidal AC wave is given by: V₀ = 2 V_ rms Substituting the given value: V₀ = 1.414 220 V 311 V Thus, the peak voltage of the supply is approximately 311 V . Answer: 311 V

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