Physics Knowledge Quiz and Answers - Set 11 - ObjectiveBooks

Physics Knowledge Quiz and Answers - Set 11

G.K. Practice Test: Question Set - 11

1. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
    (A) At sea level
    (B) At the top of Mt. Everest
    (C) At a place in a valley below sea level
    (D) In an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level

2. Optical fibre works on the
    (A) Principle of refraction
    (B) Total internal reflection
    (C) Scattering
    (D) Interference

3. Rainbow is due to
    (A) Absorption of sunlight in minute water droplets
    (B) Diffusion of sunlight through water droplets
    (C) Ionization of water deposits
    (D) Refraction and reflection of sunlight by water droplets

4. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
    (A) Scattering
    (B) Diffraction
    (C) Interference
    (D) Polarization

5. One should not connect a number of electrical appliances to the same power socket because
    (A) This can damage the appliances due to overloading
    (B) This can damage the domestic wiring due to overloading
    (C) This can damage the electrical meter
    (D) The appliance will not get full voltage

6. Minimum numbers of unequal vectors which can give zero resultant are
    (A) Two
    (B) Three
    (C) Four
    (D) More than four

7. 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 both is same but the rate of doing work is less in rolling
    (D) Work done in rolling a stone is less than in lifting it

8. Mirage is due to
    (A) Unequal heating of different parts of the atmosphere
    (B) Magnetic disturbances in the atmosphere
    (C) Depletion of ozone layer in the atmosphere
    (D) Equal heating of different parts of the atmosphere

9. Sound waves in air are
    (A) Transverse
    (B) Longitudinal
    (C) Electromagnetic
    (D) Polarized

10. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
    (A) Increase its life
    (B) Enable it to withstand higher voltages
    (C) Increase its electrical conductivity
    (D) Increase its electrical resistivity

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