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Electromagnetic Induction Test - 14
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  • Question 1/10
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    The magnetic flux passing normally through a coil is ø = 20 cos πt + t2 + 50t + 25m Wb What will be the induced emf at t = 1s?​

  • Question 2/10
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    A copper rod moves parallel to the horizontal direction. The induced emf developed across its ends due earth’s magnetic field will be maximum at the

  • Question 3/10
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    The magnetic flux through a surface varies with time as follows:

    = 12t2 + 7t + 3
    here, is in milliweber and t is in seconds.
    What will be the induced emf at t = 5s?​

  • Question 4/10
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    In Faraday’s experiment if the magnet is moved towards the coil, it results in ____________ in magnetic field B at any point on the wire loop. The _________ shows deflection. Thus emf is induced by changing B.

  • Question 5/10
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    What is the value of induced e.m.f if a wire is moved between the gap of two poles of a magnetin in 1 s and magnetic flux between the poles is 6 x 10-3 Wb?​

  • Question 6/10
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    Two similar circular co-axial loops carry equal current in the same direction. If the loops be brought nearer, the currents in them will

  • Question 7/10
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    When a wire loop is rotated in a magnetic field, the direction of induced emf changes once in each

  • Question 8/10
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    The induced e.m.f in a coil is given by ε = 100sin 100π volts. Calculate the number of rotations the coil makes per second.​

  • Question 9/10
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    The motional emf produced across a wire moving through a magnetic field does not depend on its:

  • Question 10/10
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    If we keep two similar loops made up of copper and constantan in a magnetic field for same amount of time, in which loop the induced e.m.f will be greater.

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