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Physics Test 170

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Physics Test 170
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  • Question 1
    4 / -1

    The potential energy of a 1 kg particle free to move along the x-axis is given by .The total mechanical energy of the particle is 2 J. Then, the maximum speed (in m/s) is

    Solution

     

  • Question 2
    4 / -1

    Fig. shows a disc rolling on a horizontal plane with linear velocity v. Its linear velocity is v and angular velocity is w. Which of the following gives the velocity of the particle P on the rim of the disc ?

    Solution

     

  • Question 3
    4 / -1

    The change in the value of ‘g’ at a height ‘h’ above the surface of the earth is the same as at a depth ‘d’ below the surface of earth. When both ‘d’ and ‘h’ are much smaller than the radius of earth, then which one of the following is correct ?

    Solution

     

  • Question 4
    4 / -1

    When a 4 kg mass is hung vertically on a light spring that obeys Hooke’s law, the spring stretches by 2 cms. The work required to be done by an external agent in stretching this spring by 5 cm will be (g = 9.8 m/sec²)

    Solution

     

  • Question 5
    4 / -1

    A glass tube of uniform internal radius (r) has a valve separating the two identical ends. Initially, the valve is in a tightly closed position. End 1 has a hemispherical soap bubble of radius r. End 2 has sub-hemispherical soap bubble (figure). Just after opening the valve

    Solution

     

  • Question 6
    4 / -1

    Directions For Questions

    In a vertical U-tube containing a liquid, the two arms are maintained at different temperatures t₁ and t₂.

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    The liquid columns in the two arms have heights l₁ and l₂ respectively. The coefficient of volume expansion of the liquid is equal to

    Solution

     

  • Question 7
    4 / -1

    The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

    Solution

     

  • Question 8
    4 / -1

    If the intermolecular forces vanish away, the volume occupied by the molecules contained in 4.5 g water at standard temperature and pressure will be

    Solution

     

  • Question 9
    4 / -1

    A point particle of mass 0.1 kg is executing S.H.M. of amplitude 0.1 m. When the particle passes through the mean position, its kinetic energy is joule. Obtain the equation of motion of this particle, if the initial phase of oscillation is 45.

    Solution

     

  • Question 10
    4 / -1

    An organ pipe P₁, closed at one end vibrating in its first harmonic and another pipe P₂, open at both ends vibrating in its third harmonic, are in resonance with a given tuning fork. The ratio of the lengths of P₁ and P₂ is

    Solution

     

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