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Alternating Current Test - 9
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Alternating Current Test - 9
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  • Question 1/10
    4 / -1
    The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is
    Solutions

  • Question 2/10
    4 / -1
    A hot wire ammeter reads 10 A in an AC circuit. The peak value of the current will be
    Solutions

  • Question 3/10
    4 / -1

    Solutions

  • Question 4/10
    4 / -1
    The peak value of an alternating current is 5 A and its frequency is 60 Hz. Find its rms value and time taken to reach the peak value of current starting from zero.
    Solutions

  • Question 5/10
    4 / -1
    What is the average value of the AC voltage over one complete cycle?
    Solutions

  • Question 6/10
    4 / -1
    A telephone wire of length 200 km has a capacitance of 0.014 μF per km. If it carries an AC frequency 5 kHz, what should be the value of an inductor required to be connected in series so that the impedance of the circuit is minimum?
    Solutions

  • Question 7/10
    4 / -1
    The maximum voltage in DC circuit is 282V.The effective voltage in AC circuit will be
    Solutions

  • Question 8/10
    4 / -1
    Alternating current cannot be measured by DC ammeter because
  • Question 9/10
    4 / -1
    An AC voltage source of variable angular frequency w and fixed amplitude V0, is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When ω is increased
    Solutions

  • Question 10/10
    4 / -1
    A capacitor and an inductance coil are connected in separate AC circuits with a bulb glowing in both the circuits. The bulb glows more brightly when
    Solutions

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