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Physics Test - ...

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  • Question 1
    3 / -1

    Whenever the magnetic flux linked with a coil changes, an induced e.m.f. is produced in the circuit. The e.m.f. lasts

  • Question 2
    3 / -1

    Two equal masses hang on either side of a pulley at the same height from the ground. The mass on the right is given a horizontal speed, after some time.


  • Question 3
    3 / -1

    The number of turns in an air core solenoid of length 25 cm and radius 4 cm is 100. Its self inductance will be

  • Question 4
    3 / -1

    A pole of strength mp is produced when a magnetic material of cross-sectional area A is placed in a magnetic field of strength H. The total magnetic flux will be

  • Question 5
    3 / -1

    In the circuit diagram shown below :

  • Question 6
    3 / -1

    In a series LR circuit, the voltage drop across the inductor is 8 volt and across the resistor is 6 volt. The voltage applied and the power factor of the circuit respectively are

  • Question 7
    3 / -1

    A field of strength 5 × 104 ampere turns / meter acts at right angles to the coil of 50 turns of area 10-2 m2 . The coil is removed from the field in . Then the induced e.m.f. in the coil is :

  • Question 8
    3 / -1

    A particle starts moving with initial velocity 3 m/s along x-axis from origin. Its acceleration is varying with x in parabolic nature as shown in figure. At x=√3 m tangent to the graph makes an angle 60∘ with positive x-axis as shown in diagram. Then at x =√3

  • Question 9
    3 / -1

    The ratio of primary voltage to secondary voltage in a transformer is ‘n’. The ratio of the primary current to secondary current in the transformer is :

  • Question 10
    3 / -1

    A block of mass m is connected with another block of mass 2m by a light spring. 2m is connected with a hanging mass 3m by an inextensible light string. At the time of release of block 3m?

  • Question 11
    3 / -1

    The gravitational field in a region is given by \(\vec{E}=(\hat{3} i-\hat{4} j) N k g^{-1}\) Find out the work done (in joule) in displacing a particle by \(1 \mathrm{m}\) along the line \(4 y=3 x+9\)

  • Question 12
    3 / -1

    Two bar magnets are placed on a piece of cork which floats on water. The magnets are so placed that their axis are mutually perpendicular. Then the corkTwo bar magnets are placed on a piece of cork which floats on water. The magnets are so placed that their axis are mutually perpendicular. Then the cork

  • Question 13
    3 / -1

    Two coils of inductances L1 and L2 are linked such that their mutual inductance is M. Then M=

  • Question 14
    3 / -1

    The instantaneous potential difference between points A and B is (Phase angle is 370)

  • Question 15
    3 / -1

    In a parallel plate capacitor the separation between the plates is 3mm with air between them. Now a 1mm thick layer of a material of dielectric to the original value the separation between the plates must be made

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