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Electromagnetic...

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  • Question 1
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    On what application does speedometer works?

  • Question 2
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    Mutual induction is the phenomenon by which ________ is produced in a coil due to change in the ________ associated with a neighbouring coil. 

  • Question 3
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    Which of the following statement can define the Lenz law?

  • Question 4
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    The magnetic flux in a coil is varying according to the relation ϕ = 3t2 + 2t. Find the magnitude of the induced emf at t = 1 sec.

  • Question 5
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    A coil of copper wire is moved parallel to a uniform magnetic field. The e.m.f. induced in the coil will:

  • Question 6
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    Which of the following is associated with Lenz's law?

  • Question 7
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    Determine the value of time (in sec) when an average EMF of 100 V is induced in a coil of area 200 cm2 with 100 turns, when it is completely removed from a magnetic field of 30 T acting at right angles to the coil.

  • Question 8
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    The working of A.C Generator is based on the principle of

  • Question 9
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    Induced current in a coil can be generated by changing __________

  • Question 10
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    When a conductor cuts magnetic flux, an emf is induced in the conductor. This is known as

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