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Alternating Cur...

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  • Question 1
    4 / -1

    The ratio of peak value and r.m.s. value of an alternating current is

  • Question 2
    4 / -1

    If the value of potential in an ac circuit is 10 V, then the peak value of potential is

  • Question 3
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    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

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

  • Question 5
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    Choke coil works on the principle of

  • Question 6
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    A choke coil has

  • Question 7
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    Time constant of LC circuit is

  • Question 8
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    The phase angle between e.m.f. series ac circuit is LCR series ac circuit is

  • Question 9
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  • Question 10
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    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

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