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General Knowledge :: Physics

  1. Pa(Pascal) is the unit for

  2. A.
    thrust
    B.
    pressure
    C.
    frequency
    D.
    conductivity

  3. Planets do not twinkle because

  4. A.
    they emit light of a constant intensity
    B.
    their distance from the earth does not change with time
    C.
    they are very far away from the earth resulting in decrease in intensity of light
    D.
    they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable

  5. Metals are good conductors of electricity because

  6. A.
    they contain free electrons
    B.
    the atoms are lightly packed
    C.
    they have high melting point
    D.
    All of the above

  7. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

  8. A.
    will overflow
    B.
    will not rise
    C.
    depressed
    D.
    change its meniscus

  9. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

  10. A.
    Pressure and Young's modules
    B.
    Planck's constant and Angular momentum
    C.
    Impulse and moment of force
    D.
    Force and rate of change of linear momentum

  11. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

  12. A.
    velocity
    B.
    momentum
    C.
    acceleration
    D.
    kinetic energy

  13. Pick out the scalar quantity

  14. A.
    force
    B.
    pressure
    C.
    velocity
    D.
    acceleration

  15. Rectifiers are used to convert

  16. A.
    Direct current to Alternating current
    B.
    Alternating current to Direct current
    C.
    high voltage to low voltage
    D.
    low voltage to high voltage

  17. out of the following, which is not emitted by radioactive substance?

  18. A.
    Electrons
    B.
    Electromagnetic radiations
    C.
    Alpha particles
    D.
    Neutrons

  19. Sound waves in air are

  20. A.
    transverse
    B.
    longitudinal
    C.
    electromagnetic
    D.
    polarised