Physics

    Current Electricity
    A current of 4 mA is flowing through a wire for 2 minutes, then the charge flowing through the wire will be
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    Geometrical Optics
    The incident ray, the normal and the reflected ray at the point of incidence all lie in the same plane. This is the law of
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    Physics
    Air pressure is usually highest when the air is
    Air pressure is usually highest when the air is cool and moist.
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    Physics
    What is the reason for twinkling of stars ?
    Atmospheric refraction is the reason behind the twinkling of stars._x000D_ The starlight on entering earth surface undergoes refraction continuously before it reaches to earth. The starlight bend towards the normal as it enters from rarer to denser medium. The air near the earth surface is denser than upper layers. Therefore the apparent position of the stars are slightly different from its actual position, when it is viewed from horizon._x000D_ The apparent position of stars are not stationary and keeps on changing slightly, because the physical condition of the atmosphere are not stationary._x000D_ Because of this the stars sometimes appears brighter and sometimes appear fainter.
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    Work and Energy
    (a required form of output/total input energy)×100 is equal to
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    Basic Electronics
    The process of emission of electrons from hot metal surface is called
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    Dynamics
    The quantity of matter inside body is
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    Turning Effect of Forces
    If after a slight tilt the body returns to its previous equilibrium, then it is said to be in
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    Physics
    In radio-communication, the signals emitted by transmitting antenna are reflected on
    The lower atmosphere is more or less transparent to radio waves. However, the ionosphere reflects back the radio waves. Thus, a signal emitted by an antenna from a certain place can be received at another place on the surface of Earth in the following two ways: ground wave propagation and sky wave propagation.
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    Physics
    Which of these is exhibiting kinetic energy?
    A space station orbiting Earth is exhibiting kinetic energy.
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