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Physics Test 11...

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  • Question 1
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    A wheel whose moment of inertia is12 kgm2 has an initial angular velocity of 40 rad/s. A constant torque of 20 NM acts on the wheel. The time in which the wheel is accelerated to 100 rad/s is

  • Question 2
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    The M.I. of a solid sphere of mass M and radius R about an axis at a distance 2R from centre is

  • Question 3
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    A reversible engine Converts one-sixth of the heat input into work. When the temperature of the sink is reduced by  the efficiency of the engine is doubled. The temperature of source and sink are

  • Question 4
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    Two liquids A and B are 32oC and 24oC. When mixed in equal masses the temperature of the mixture is found to be 28oC. Their specific heats are in the ratio of

  • Question 5
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    Which of the following is not a postulate of kinetic theory of gases ?

  • Question 6
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    Certain perfect gas is found to obey PV3/2 = constant during an adiabatic process. If such a gas at initial temperature T is adiabatically compressed to half the initial volume, its final temperature will be

  • Question 7
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    The first law of thermodynamics is concerned with the conservation of

  • Question 8
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    For hydrogen the temperature and volume are related to each other according to the relation  When the gas undergoes an adiabatic process and changes from thermodynamic state 1 to 2, the value of x is

     

  • Question 9
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    The colour of a star is an indication of its

  • Question 10
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    A given mass of a gas expands from the state A to the state B by three paths 1, 2 and 3 as shown in the figure.

    If W1, W2 and W3 respectively be the work done by the gas along the three paths then

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