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Physics Test - ...

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  • Question 1
    4 / -1

    A screw gauge has the least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is:

  • Question 2
    4 / -1

    The minimum energy required to eject an electron, from the metal surface is called:

  • Question 3
    4 / -1

    The end \(A\) of a rod \(A B\) of length \(1 \mathrm{~m}\) is maintained at \(100{ }^{\circ} \mathrm{C}\) and the end \(B\) at \(10^{\circ} \mathrm{C}\). What is the temperature (in \({ }^{\circ} \mathrm{C}\) ) at a distance of \(60 \mathrm{~cm}\) from the end \(B\) ?

  • Question 4
    4 / -1

    A particle of mass \(m\) carrying charge \(+q_{1}\) is revolving around a fixed charge \(-q_{2}\) in a circular path of radius \(r\). Calculate the period of revolution.

  • Question 5
    4 / -1

    A proton and an \(\alpha\) -particle (with their masses in the ratio of \(1: 4\) and charges in the ratio of \(1: 2\) are accelerated from rest through a potential difference \(V\). If a uniform magnetic field (B) is set up perpendicular to their velocities, the ratio of the radii \(r_{p}: r_{\alpha}\) of the circular paths described by them will be:

  • Question 6
    4 / -1

    The magnetic flux linked with a coil varies as \(\phi=3 \mathrm{t}^{2}+4 \mathrm{t}+9\). The magnitude of the emf induced at \(\mathrm{t}=2\) sec is:

  • Question 7
    4 / -1

    The values of voltage (VD) across a tunnel-diode corresponding to peak and valley currents are VP and VV respectively. The range of tunnel-diode voltage VD for which the slope of its I – VD characteristics is negative would be:

  • Question 8
    4 / -1

    A Nicol prism is based on the principle of:

  • Question 9
    4 / -1

    At constant pressure, the volume of the gas is directly proportional to its absolute temperature. This is the statement of?

  • Question 10
    4 / -1

    Given below are two statements:

    Statement I : A speech signal of 2 kHz is used to modulate a carrier signal of 1 MHz. The bandwidth requirement for the signal is 4 kHz.

    Statement II : The side band frequencies are 1002 kHz and 998 kHz.

    In the light of the above statements, choose the correct answer from the options given below:

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