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Physics Test 146

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Physics Test 146
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  • Question 1
    4 / -1

    A flywheel gains a speed of 540 rpm in 6 s. Its angular acceleration is

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  • Question 2
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    The rotational analogue of force is called

    Solution

    Rotational analogue of force is also known as torque or moment of force.

     

  • Question 3
    4 / -1

    A rod elongates by l when a body of mass M is suspended from it. The work done is

    Solution

     

  • Question 4
    4 / -1

    A wire of length L and cross-section area A is made of material of Young’s modulus Y. The work done in stretching the wire by an amount x is

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  • Question 5
    4 / -1

    The value of young’s modulus for perfectly rigid body is

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  • Question 6
    4 / -1

    A wire can sustain a weight of 15 kg. If it cut into four equal parts, then each part can sustain a weight.

    Solution

    Breaking stress does not depend upon the length of the cable.

     

  • Question 7
    4 / -1

    Calculate the number of atoms in 39.4 g gold. Molar mass of gold is 

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  • Question 8
    4 / -1

    The value of gas constant R in SI units is

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  • Question 9
    4 / -1

    The ratio of the specific heats of a gas is related to degrees of freedom by

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  • Question 10
    4 / -1

    A mass M is suspended from a light spring. An additional mass m added displaces the spring further by a distance X. Now, the combined mass will oscillate on the spring with period

    Solution

     

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