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Alternating Current Test - 33
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Alternating Current Test - 33
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  • Question 1/10
    4 / -1
    An inductance L having a resistance R is connected to an alternating source of angular frequency ω. The quality factor (Q) of the inductance is
    Solutions

  • Question 2/10
    4 / -1
    A uniform but time varying magnetic field B (t) exists in a circular region of radius a and is directed into the plane of the paper as shown. The magnitude of indudced electric field at point P at a distance r from the centre of the circular region is

    Solutions

  • Question 3/10
    4 / -1
    A wind powered generator converts wind energy into electrical energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electric energy. For wind speed v, the electric power output will be proportional to
    Solutions

  • Question 4/10
    4 / -1
    Two circular coils can be arranged in any of the three situations shown in fig. their mutual inductance will be

  • Question 5/10
    4 / -1
    The current flowing in a step down transformer 220 V to 22 V having impedance 220Ω is
    Solutions

  • Question 6/10
    4 / -1
    A capacitor of capacity C has reactance X.If capacitance and frequency become double, then reactance will be
    Solutions

  • Question 7/10
    4 / -1
    The power factor of an a.c. circuit having resistance R and inductance L connected in series to an a.c. source of angular frequency ω is
    Solutions

  • Question 8/10
    4 / -1
    A coil having 500 square loops of side 10cm is placed normal to magnetic field which increases at a rate of 1 T/sec. The induced e.m.f is
    Solutions

  • Question 9/10
    4 / -1
    Power delivered by the source in the circuit is maximum, when
    Solutions

  • Question 10/10
    4 / -1
    An inductor L and a capacitor C are connected in the circuit as shown in fig. The frequency of power supply is equal to the resonance frequency of the circuit. Which ammeter will read zero ampere?

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