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Electromagnetic...

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  • Question 1
    4 / -1

    The self-inductance of a straight conductor is

  • Question 2
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    What is the coefficient of mutual inductance when the magnetic flux changes by 2 × 10–2 Wb and change incurrent is 0.01 A

  • Question 3
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    A varying current at the rate of 3A/s in a coil generates an e.m.f. of 8 mV in a nearby coil. The mutual inductance of the two coils is

  • Question 4
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    If a current of 10 A flows in one second through a coil, and the induced e.m.f. is 10 V, then the self-inductanceof the coil is

  • Question 5
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    The inductance of a solenoid 0.5 m long of cross-sectional area 20 cm2 and with 500 turns is

  • Question 6
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    The equivalent inductance of two inductances is 2.4 henry when connected in parallel and 10 henry when connected in series. The difference between the twoinductances is

  • Question 7
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    An average induced e.m.f. of 1 V appears in a coil when the current in it is changed from 10 A in one direction to 10 A in opposite direction in 0.5 sec. Self-inductance of the coils is

  • Question 8
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    A coil of resistance 10 Ω and an inductance 5 H is connected to a 100 volt battery. Then energy stored in the coil is

  • Question 9
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    If a change in current of 0.01 A in one coil produces a change in magnetic flux of 1.2 × 10–2 Wb in the other coil, then the mutual inductance of the two coils inhenry is

  • Question 10
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    Two coils of self-inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutualinductance between these coils is

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