Physics miscellaneous

Physics miscellaneous

Easy Questions

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Physics miscellaneous
  1. When a body falls from an aeroplane, there is increase in its








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    The energy possessed by a body by virtue of its motion is called kinetic energy. Potential Energy is the energy possessed by virtue of its position or configuration. When a body falls from an aeroplane, there is increase in its acceleration.

    Correct Option: C

    The energy possessed by a body by virtue of its motion is called kinetic energy. Potential Energy is the energy possessed by virtue of its position or configuration. When a body falls from an aeroplane, there is increase in its acceleration.

  1. Water is not suitable as a calorimetric substance because it :








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    The specific heat of water is higher than all other common substances. Hence, water is used for heating purposes (as in hot water bottles) and for cooling purposes (as in radiators of cars). Off all the liquids, mercury has the lowest specific heat due to which it is used as a thermometric liquid .

    Correct Option: A

    The specific heat of water is higher than all other common substances. Hence, water is used for heating purposes (as in hot water bottles) and for cooling purposes (as in radiators of cars). Off all the liquids, mercury has the lowest specific heat due to which it is used as a thermometric liquid .

  1. The method of magnetisation is:








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    Hammering a rod will either allow it to become slightly magnetic if laid along a magnetic field (i.e.North - South) or demagnetise it if laid across the field lines (i.e. East-West). A current passing through a coil will produce a magnetic field.

    Correct Option: A

    Hammering a rod will either allow it to become slightly magnetic if laid along a magnetic field (i.e.North - South) or demagnetise it if laid across the field lines (i.e. East-West). A current passing through a coil will produce a magnetic field.

  1. The characteristic invalid for heat radiation is that it travels :








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    Heat is a form of energy. An important property of heat is that it flows from a body at higher temperature to another body at lower temperature.

    Correct Option: C

    Heat is a form of energy. An important property of heat is that it flows from a body at higher temperature to another body at lower temperature.

  1. A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.








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    If the angle of incidence of light ray in the denser medium is greater than the critical angle of the concerned media pair, the light is not at all reflected in to the rarer medium but is totally reflected. This is known as ‘total internal reflection’.

    Correct Option: D

    If the angle of incidence of light ray in the denser medium is greater than the critical angle of the concerned media pair, the light is not at all reflected in to the rarer medium but is totally reflected. This is known as ‘total internal reflection’.