Physics Current Affairs 2018

  1. Nuclear sizes are expressed in a unit named:
    A. Angstrom
    B. Fermi
    C. Newton
    D. Tesla
  2. B. Fermi
    Fermi - A unit of length equal to 10-15 meter (one femtometer) used in nuclear physics. It is similar to the diameter of a proton.
  3. It is easier to roll a stone up a sloping road than to lift it vertical upwards because:
    A. work done in rolling is more than in lifting
    B. work done in lifting the stone is equal to rolling it
    C. work done in rolling a stone is less than in lifting it
    D. work done in both is same but the rate of doing work is less in rolling
  4. C. work done in rolling a stone is less than in lifting it
  5. Mirage is due to:
    A. equal heating of different parts of the atmosphere
    B. unequal heating of different parts of the atmosphere
    C. depletion of ozone layer in the atmosphere
    D. magnetic disturbances in the atmosphere
  6. B. unequal heating of different parts of the atmosphere

  7. Light year is a unit of:
    A. distance
    B. intensity of light
    C. light
    D. time
  8. A. distance
  9. Light from the Sun reaches us in nearly:
    A. 16 mins.
    B. 8 mins.
    C. 4 mins.
    D. 2 mins.
  10. B. 8 mins.
  11. Pa(Pascal) is the unit for:
    A. Conductivity
    B. Frequency
    C. Pressure
    D. Thrust
  12. C. Pressure
  13. Planets do not twinkle because:
    A. they are very far away from the earth resulting in decrease in intensity of light
    B. they are nearer to earth and hence we receive a greater amount of light and therefore minor variations in the intensity are not noticeable
    C. they emit light of a constant intensity
    D. their distance from the earth does not change with time
  14. B. they are nearer to earth and hence we receive a greater amount of light and therefore minor variations in the intensity are not noticeable
  15. Metals are good conductors of electricity because:
    A. they have high melting point
    B. they contain free electrons
    C. the atoms are lightly packed
    D. All of the above
  16. B. they contain free electrons

  17. Out of the following pairs choose the pair in which the physical quantities do not have identical dimension?
    A. Impulse and moment of force
    B. Force and rate of change of linear momentum
    C. Planck's constant and Angular momentum
    D. Pressure and Young's modules
  18. A. Impulse and moment of force
  19. 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:
    A. acceleration
    B. kinetic energy
    C. momentum
    D. velocity
  20. C. momentum