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Alternating Cur...

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  • Question 1
    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

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

  • Question 3
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  • Question 4
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    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.

  • Question 5
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    What is the average value of the AC voltage over one complete cycle?

  • Question 6
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    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?

  • Question 7
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    The maximum voltage in DC circuit is 282V.The effective voltage in AC circuit will be

  • Question 8
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    Alternating current cannot be measured by DC ammeter because

  • Question 9
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    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

  • Question 10
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    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

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