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Physics Test - ...

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  • Question 1
    1 / -0

    The translational kinetic energy of molecules of one mole of a monatomic gas is \(U=\frac{3 N k T}{ 2}\). The value of atomic specific heat of gas under constant pressure will be :

  • Question 2
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    Which of the following method is used to measure the distance of a planet or star from Earth?

  • Question 3
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    The ratio of the radius of the nucleus of the radius of an atom is of the order of:

  • Question 4
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    Coloumbs force between two point charges varies with distance 'r' in relation to _________.

  • Question 5
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    \(\mathrm{An}~ \mathrm{L}-\mathrm{C}-\mathrm{R}\) series circuit with \(\mathrm{L}=\mathbf{0 . 1 2 0} \mathrm{H}, \mathbf{R}=240 \Omega\), and \(\mathrm{C}=\mathbf{7 . 3 0 \mu} \mathrm{F}\) carries an rms current of \(0.450\) A with a frequency of \(400 \mathrm{~Hz}\). The average rate at which electrical energy is converted to thermal energy in the resistor is given as \(\frac{x}{10} \mathbf{W} .\) Find \(x\):

  • Question 6
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    Velocity versus displacement graph of a particle moving in a straight line is as shown in figure

    The acceleration of the particle:

  • Question 7
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    The mean free path of electrons in a metal is 4 ×10-8 m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in unit of Vm-1.

  • Question 8
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    For constructive interference between two waves of equal wavelength, the phase angle \(\delta\) should be such that:

  • Question 9
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    Let the moment of inertia of a hollow cylinder of length \(30 \mathrm{~cm}\) (inner radius \(10 \mathrm{~cm}\) and outer radius \(20 \mathrm{~cm}\) ), about its axis be \(\mathrm{I}\). The radius of a thin cylinder of the same mass such that its moment of inertia about its axis is also \(\mathrm{I}\) is:

  • Question 10
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    A sinusoidal voltage \(V(t) = 100 sin (500t)\) is applied across a pure inductance of \(L = 0.02 H\). The current through the coil is :

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