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Electromagnetic...

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  • Question 1
    4 / -1

    The self-inductance of a coil is 5 henry, a current of 1 A change to 2 A within 5 second through the coil. The value of induced e.m.f. will be

  • Question 2
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    The unit of inductance is

  • Question 3
    4 / -1

    Self-inductance of a coil is 50 mH. A current of 1 A passing through the coil reduces to zero at steady rate in 0.1 sec, the self-induced e.m.f. is

  • Question 4
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    5 cm long solenoid having 10 omh resistance and 5 mH inductance is joined to a 10 volt battery. At steady state the current through the solenoid in ampere will be

  • Question 5
    4 / -1

    An ideal coil of 10 henry is joined in series with a resistance of 5 ohm and a battery of 5 volt. 2 second after joining, the current flowing in ampere in the circuit will be

  • Question 6
    4 / -1

    A circular coil of radius 5 cm has 500 turns of a wire. The approximate value of the coefficient of self-induction of the coil will be

  • Question 7
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    In a coil of self-inductance 0.5 henry, the current varies at a constant rate from zero to 10 amperes in 2 seconds. The e.m.f. generated in the coil is

  • Question 8
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    A coil of self-inductance 50 henry is joined to the terminals of a bettery of e.m.f. 2 volts through a resistance of 10 ohm and a steady current is flowing through the circuit. If the battery is now disconnected, the time in which the current will decay to 1/e of its steady value is

  • Question 9
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    The self-inductance of a solenoid of length L, area of cross-section A and having N turns is

  • Question 10
    4 / -1

    The self-inductance of a coil is L. Keeping the length and area same, the number of turns in the coil is increased to four times. The self-inductance of the coil will now be

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