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NCERT Textbook
ALTERNATING CURRENT

Class 12
Physics :-Additional Questions - Set - 1 - Alternating Current

For an LCR circuit with an ac source of, Angular frequency co,

  • a. Circuit will be capacitive if \omega>\frac{1}{\sqrt{\mathrm{LC}}}
  • b. Circuit will be inductive if \omega=\frac{1}{\sqrt{L C}}
  • c. A power factor of a circuit will be unity if capacitive reactance equals inductive reactance
  • d. Current will be leading voltage if \omega>\frac{1}{\sqrt{\mathrm{LC}}}

    • Answer:

    c. A power factor of a circuit will be unity if capacitive reactance equals inductive reactance

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