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Electromagnetic...

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  • Question 1
    4 / -1

    Why is the iron core of a transformer made laminated instead of being in one solid piece?

  • Question 2
    4 / -1

    Eddy currents do not cause:

  • Question 3
    4 / -1

    Foucault Currents are also called

  • Question 4
    4 / -1

    Eddy currents have negative effects. Because they produce:

  • Question 5
    4 / -1

    The no-load current drawn by transformer is usually what percent of the full-load current ?

  • Question 6
    4 / -1

    Which of the following will not increase the size and effect of eddy current?

  • Question 7
    4 / -1

    A circular coil of area 200 cm2 and 25 turns rotates about its vertical diameter with an angular speed of 20 ms-1 in a uniform horizontal magnetic field of magnitude 0.05 T. The maximum voltage induced in the coil is​:

  • Question 8
    4 / -1

    Which of the following is not an application of eddy currents?

  • Question 9
    4 / -1

    In electromagnetic induction, line integral of induced field E around a close path is __________, induced electric field is ___________.​

  • Question 10
    4 / -1

    Identify the law which is used to find out the direction of eddy currents.

  • Question 11
    4 / -1

    In the dead beat galvanometer, the coil is wound on a frame made of:​

  • Question 12
    4 / -1

    Identify the type of commercial motor which works as a consequence of eddy currents.

  • Question 13
    4 / -1

    Eddy currents can be induced in​

  • Question 14
    4 / -1

    Name the current induced in solid metallic masses when the magnetic flux threading through them changes.

  • Question 15
    4 / -1

    How can electromagnetic damping be increased?

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