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Physics Test-8...

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  • Question 1
    4 / -1

    A satellite revolves in a circular orbit around a planet of radius R. The percentage increase in energy required to lift the satellite to an orbit of radius 5R from an orbit of radius 3R is:

  • Question 2
    4 / -1

    If the product of 'muscular strength' and speed is equal to dimensions of power, then the dimensions of 'muscular strength' is:

  • Question 3
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    The dependence of magnetic susceptibility χ with temperature for a diamagnetic substance is represented by which of the following?

  • Question 4
    4 / -1

    The pressure of an ideal gas undergoing isothermal change is increased by \(10 \%\). The volume of the gas must decrease by about:

  • Question 5
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    Which of the following metals will exhibit a photoelectric effect most easily?

  • Question 6
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    The conservation of linear momentum can be understood by which of the following laws?

  • Question 7
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    The heat given to an ideal gas in isothermal conditions is used to:

  • Question 8
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    With ‘p’ for proton and 'n’ for neutron, the nuclear forces have strengths in the order

  • Question 9
    4 / -1

    In vacuum an electron of energy 10 keV hits tungeston target, then emitted radiation will be:

  • Question 10
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    The size of a simple pendulum is kept very small (point mass) because:

  • Question 11
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    If a wire in the circuit is replaced with a wire of resistivity four times and the length and cross-sectional area is the same. Then the current in the circuit will become:

  • Question 12
    4 / -1

    If the frequency of the side bands of a modulated signal are 1020 kHz and 980 kHz, then find the frequency of the carrier wave.

  • Question 13
    4 / -1

    A dielectric is placed in an electric field E.

  • Question 14
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    A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is:

  • Question 15
    4 / -1

    Consider the following statement for a circular conductor moving in and out of the magnetic field:

    1. The polarity of induced motional EMF is such that it supports the change in magnetic flux responsible for its production.
    2. Magnetic flux is independent of the area of the circular conductor.
    3. If the coil is cut somewhere and then moved in and out of the magnetic field, EMF will be generated.
    4. The basic cause of induced emf is the change in magnetic flux.

    Which of the following statements are correct?

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