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Physics Test-21...

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  • Question 1
    4 / -1

    The acceleration (a) of a particle is plotted on the \(Y\)-axis while the time (t) elapsed is plotted along the X-axis. What does the a - t graph give?

  • Question 2
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    The angular resolution of telescope of \(10 cm\) diameter at a wavelength of \(5000 \mathring{\mathrm{A}}\) is of the order of:

  • Question 3
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    A certain spacecraft is used to transport astronauts from International Space Station (ISS) to Earth. The spacecraft is designed to have three parts labelled P, Q and R each of mass 1200 kg, 3150 kg, and 2800 kg respectively. When the spacecraft is launched the exhaust system produces a force of 1430 N. Calculate the acceleration of the spacecraft as it leaves the ISS.

  • Question 4
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    Why does mercury not evaporate at room temperature?

  • Question 5
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    If force and displacement of the particle (in direction of force) are doubled.

    Work should be:

  • Question 6
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    The resolving power of a telescope depends upon the:

  • Question 7
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    A rectangular coil of length \(40\) cm and width \(10\) cm consists of \(10\) turns and carries a current of \(16\) A. The coil is suspended such that the normal to the plane of the coil makes an angle of \(60^{\circ}\) with the direction of a uniform magnetic field of magnitude \(0.60\) T. Find the magnitude of the torque experienced by the coil.

  • Question 8
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    An external force of 40 N is acting on a wooden block moving on a rough surface with a constant velocity of 2 m/s. Find the friction force on the block.

  • Question 9
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    Thermal diffusivity is a __________.

  • Question 10
    4 / -1

    Among the following compounds, the strongest base is:

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