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Alternating Current Test - 47
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Alternating Current Test - 47
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  • Question 1/10
    4 / -1
    The ratio of peak value and r.m.s. value of an alternating current is
  • Question 2/10
    4 / -1
    If the value of potential in an ac circuit is 10 V, then the peak value of potential is
    Solutions

  • Question 3/10
    4 / -1
    A lamp consumes only 50% of peak power in an ac circuit. What is the phase difference between the applied voltage and the circuit current
    Solutions

  • Question 4/10
    4 / -1
    The instantaneous voltage through a device of impedance 20 Ω is e = 80 sin 100 πt. The effective value of the current is
    Solutions

  • Question 5/10
    4 / -1
    Choke coil works on the principle of
  • Question 6/10
    4 / -1
    A choke coil has
  • Question 7/10
    4 / -1
    Time constant of LC circuit is
  • Question 8/10
    4 / -1
    The phase angle between e.m.f. series ac circuit is LCR series ac circuit is
  • Question 9/10
    4 / -1

    Solutions

  • Question 10/10
    4 / -1
    The instantaneous value of current in an ac circuit is I = 2 sin (100 πt + π/3) A. The current will bemaximum for the first time at
    Solutions

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