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Physics Test 27...

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  • Question 1
    4 / -1

    During the magnetic braking of trains if the north and the south poles are replaced with each other, then the velocity of the train will:

  • Question 2
    4 / -1

    A coil of wire of radius R has 200 turns and self – inductance of 108 mH. The self – inductance of a similar coil of 500 turns will be:

  • Question 3
    4 / -1

    The value of alternating emf E in the given circuit will be:

  • Question 4
    4 / -1

    In the second experiment of Faraday and Henry, the primary coil is connected to the galvanometer and the secondary coil is connected to a battery. If the primary coil is rotated about its axis, then:

  • Question 5
    4 / -1

    When the north pole of a magnet is moved towards a coil that is connected to a circuit, consider the following statement:

    a. North pole will be formed on the magnet side of the coil.

    b. South pole will be formed on the magnet side of the coil.

    c. Direction of Induced current will be clockwise when the coil is seen from the magnet side.

    d. Direction of Induced current will be anti-clockwise when the coil is seen from the magnet side.

  • Question 6
    4 / -1

    Two long solenoids S1 and S2 have equal lengths and the solenoid S1 is placed co-axially inside the solenoid S2. If the current in both the solenoids is doubled, then the mutual inductance of both the solenoids will become:

  • Question 7
    4 / -1

    An ideal transformer has 500 and the 1000 turns in the primary and the secondary coil. If the DC voltage of 120 V is applied to the primary coil, then the emf produced at the secondary coil will be:

  • Question 8
    4 / -1

    A magnet NS is suspended from a spring and while it oscillates, the magnet moves in and out of the coil. The coil is connected to a galvanometer G. Then, as the magnet oscillates,

  • Question 9
    4 / -1

    Which of the following electromagnetic waves have the longest wavelength?

  • Question 10
    4 / -1

    Maxwell’s displacement current is a response to

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