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Alternating Current Test - 31
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Alternating Current Test - 31
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  • Question 1/10
    4 / -1
    In the a.c. circuit shown in fig. the supply voltage has a constant r.m.s value V, but variable frequency f, Resonance frequency is

    Solutions

  • Question 2/10
    4 / -1
    In the circuit shown in fig if value of R = 60Ω, then the current flowing through the condenser will be

    Solutions

  • Question 3/10
    4 / -1
    The value of conductance in the adjoining circuit shown if fig is

    Solutions

  • Question 4/10
    4 / -1
    If number of turns in primary and secondary coils is increased to two times each, the mutual inductance
    Solutions

  • Question 5/10
    4 / -1
    The current flowing in a coil of self inductance 0.4 mH is increased by 250 mA in 0.1 s. The e.m.f induced will be
    Solutions

  • Question 6/10
    4 / -1
    Mutual inductance of two coils can be increased by
    Solutions

  • Question 7/10
    4 / -1
    An LCR series circuit is connected to a source of alternating current. At resonance, the applied voltage and the current flowing through the circuit will have a phase difference of
  • Question 8/10
    4 / -1
    In general, in an alternating current circuit
  • Question 9/10
    4 / -1
    In a noiseless transformer, an alternating current of 2 ampere is flowing in the primary coil. The no. of turns in the primary and secondary coils are 100 and 20 respectively. The value of the current in secondary coil is
    Solutions

  • Question 10/10
    4 / -1
    In a car spark coil, an emf of 40000 V is induced in a secondary when the primary current changes from 4 A to zero in 10μs. Find the mutual inductance between the primary and secondary windings of the spark coil.
    Solutions

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