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Physics Test - ...

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  • Question 1
    4 / -1

    If the mirror of a periscope is replaced by lenses then which of the following phenomenon will occur to operate the periscope properly?

  • Question 2
    4 / -1

    If a current \(I\) given by \(I_{0} \sin [\omega t-(\frac{\pi} { 2})]\) flows in an ac circuit across which an ac potential of \(E=\mathrm{E}_{\mathrm{0}} sin~\omega t\) has been applied, then the power consumption \(\mathrm{P}\) in the circuit will be,

  • Question 3
    4 / -1

    A cylinder with a movable piston contains 3 moles of hydrogen at standard temperatureand pressure. The walls of the cylinder are made of a heat insulator, and the pistonis insulated by having a pile of sand on it. By what factor does the pressure of thegas increase if the gas is compressed to half its original volume?

  • Question 4
    4 / -1

    The length of a second’s pendulum is:

  • Question 5
    4 / -1

    A \(100 \Omega\) resistance and a capacitor of \(100 \Omega\) reactance are connected in series across a \(220 \mathrm{~V}\) source. When the capacitor is \(50 \%\) charged, the peak value of the displacement current is:

  • Question 6
    4 / -1

    β-decay means emission of electron from:

  • Question 7
    4 / -1

    Unit of magnetic flux is:

  • Question 8
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    The molecule of a monatomic gas has only three translational degrees of freedom. Thus, the average energy of a molecule at temperature ' \(T\) ' is ______.

  • Question 9
    4 / -1

    If simple harmonic motion is represented by\(x=A \cos (\omega t+\varphi)\) then\(' \varphi^{\prime}\) is _____________.

  • Question 10
    4 / -1

    Two resistors of 60 ohms and 40 ohms are arranged in series across a 220 volt supply. How much heat is produced by this combination in half a minute?

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