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Alternating Current Test - 45
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Alternating Current Test - 45
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  • Question 1/10
    4 / -1
    The power is transmitted from a power house on high voltage ac because
    Solutions

  • Question 2/10
    4 / -1
    The potential difference V and the current i flowing through an instrument in an ac circuit of frequency f are given by V = 5 cos ωt volts and I = 2 sin w t amperes (where ω = 2πf). The power dissipated in the instrument is
    Solutions

  • Question 3/10
    4 / -1

    Solutions

  • Question 4/10
    4 / -1
    The resistance of a coil dc is in ohms. In ac, the resistance
    Solutions

  • Question 5/10
    4 / -1
    In an ac circuit, peak value of voltage is 423 volts. Its effective voltage is
    Solutions

  • Question 6/10
    4 / -1
    Power dissipated in an LCR series circuit connected to an ac source of emf E is
    Solutions

  • Question 7/10
    4 / -1
    A generator produces a voltage that is given by V = 240 sin 120 t, where t is in seconds. The frequency and r.m.s. voltage are
    Solutions

  • Question 8/10
    4 / -1
    If E0 represents the peak value of the voltage in an ac circuit, the r.m.s. value of the voltage will be
  • Question 9/10
    4 / -1
    The peak value of 220 volts of ac mains is
    Solutions

  • Question 10/10
    4 / -1
    A sinusoidal ac current flows through a resistor of resistance R. If the peak current is Ip, then the power dissipated is
    Solutions

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