Circuits and Circuit Theory MCQs with answers Page - 2

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Q. At _________ frequencies the parallel R-L circuit behaves as purely resistive.

  • (A) low
  • (B) very low
  • (C) high
  • (D) very high

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Q. At very low frequencies a series R-C circuit behaves as almost purely

  • (A) resistive
  • (B) inductive
  • (C) capacitive
  • (D) none of the above

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Q. Capacitive reactance is more when

  • (A) capacitance is less and frequency of supply is less
  • (B) capacitance is less and frequency of supply is more
  • (C) capacitance is more and frequency of supply is less
  • (D) capacitance is more and frequency of supply is more

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Q. Capacitive susceptance is a measure of

  • (A) reactive power in a circuit
  • (B) the extent of neutralisation of reactive power in a circuit
  • (C) a purely capacitive circuit’s ability to pass current
  • (D) a purely capacitive circuit’s ability to resist the flow of current

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Q. For a frequency of 200 Hz, the time period will be

  • (A) 0.05 s
  • (B) 0.005 s
  • (C) 0.0005 s
  • (D) 0.5 s

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Q. For a sine wave with peak value Emax _________ 8.30. the average value is

  • (A) 0.636 Emax
  • (B) 0.707 Emax
  • (C) 0.434 EWc
  • (D) lAUEmax

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Q. For a sine wave with peak value Imax the r.m.s. value is

  • (A) 0.5 Imax
  • (B) 0.707
  • (C) 0.9
  • (D) 1.414 Lmax

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Q. For the same peak value which of the following wave will ‘have the highest r.m.s. value?

  • (A) square wave
  • (B) half wave rectified sine wave
  • (C) triangular wave
  • (D) sine wave

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Q. For the same peak value, which of the following wave has the least mean value?

  • (A) half wave rectified sine wave
  • (B) triangular wave
  • (C) sine wave
  • (D) square wave

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