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Electromagnetic...

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  • Question 1
    4 / -1

    The current in a coil changes from 4 ampere to zero in 0.1 s. If the average e.m.f. induced is 100 volt, what is the self-inductance of the coil

  • Question 2
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    Pure inductance of 3.0 H is connected as shown below. The equivalent inductance of the circuit is

  • Question 3
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    The inductance of a closed-packed coil of 400 turns is 8 mH. A current of 5 mA is passed through it. The magnetic flux through each turn of the coil is?

  • Question 4
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    When the current through a solenoid increases at a constant rate, the induced current

  • Question 5
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    In a coil rate of change of area is 5 m2/milli second and current becomes 1 A from 2 A in 2 × 10–3 sec. If magnitude of field is 1 tesla then self-inductance of the coil is

  • Question 6
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    An e.m.f. of 12 volt is produced in a coil when the current in it changes at the rate of 45 amp/minute. The inductance of the coil is

  • Question 7
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    If the switch in the following circuit is turned off, then

  • Question 8
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    Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 second, given L = 10 µ H

  • Question 9
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  • Question 10
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    A coil of inductance 40 henry is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is

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