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Physics Test - ...

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  • Question 1
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    A coil having \(100\) turns and area of \(0.001 m^{2}\) is free to rotate about an axis. The coil is placed perpendicular to magnetic field of \(1.0 wb / m^{2}\). The resistance of the coil is \(10 .\) If the coil is rotated rapidly through an angle of \(180^{\circ},\) how much charge will flow through the coil?

  • Question 2
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    In the given circuit, the potential difference across PQ will be nearest to

  • Question 3
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    According to Gauss’s law, if \(E\) is _________, the charge density in the ideal conductor is zero.

  • Question 4
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    A geyser heats water flowing at the rate of \(3.0\) litres per minute from \(27^{\circ} C\) to \(77^{\circ} C\). If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is \(4.0 \times 10^{4} J / g\) ?

  • Question 5
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    The displacement of a particle executing simple harmonic motion is given by \(y=A_{0}+A \sin \omega t+B \cos \omega t\). Then the amplitude of its oscillation is given by:

  • Question 6
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    The function \(\sin ^{2}(\omega t)\) represents :

  • Question 7
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    "Heat cannot by itself flow from a body at a lower temperature to a body at a higher temperature"- the statement is which of the following?

  • Question 8
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    Two spherical bodies of masses \('M'\) and \('5M'\) and radii \('R'\) and \('2R'\), respectively, are released in free space with initial separation between their centres equal to \('12R'\). If they attract each other due to gravitational force only, then what is the distance covered by the smaller body just before collision?

  • Question 9
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    _________ developedthe corpuscular theory of light.

  • Question 10
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    A circular coil of radius \(10 \mathrm{~cm}, 500\) turns and resistance \(2 \Omega\) is placed with its plane perpendicular to the horizontal component of the earth's magnetic field. It is rotated about its vertical diameter through \(180^{\circ}\) in \(0.25 \mathrm{~s}\). Estimate the magnitudes of the emf and current induced in the coil. Horizontal component of the earth's magnetic field at the place is \(3.0 \times 10^{-5} \mathrm{~T}\):

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