1. How much noise is produced when man breathes?

    (A) 35 Decimal

    (B) 0.1 Decimal

    (C) 0.5 Decimal

    (D) 10 Decimal

    Correct Answer

    Answer: Option D

  2. Of the various non-conventional energy sources that are being tapped, which has the largest potential?

    (A) Water power

    (B) Wind power

    (C) Solar power

    (D) Biomass power

    Correct Answer

    Answer: Option C

  3. The absorption of ink by blotting paper involves

    (A) Viscosity of ink

    (B) Capillary action phenomenon

    (C) Diffusion of ink through the blotting

    (D) Siphon action

    Correct Answer

    Answer: Option B

  4. Nuclear sizes are expressed in a unit named

    (A) Fermi

    (B) Angstrom

    (C) Newton

    (D) Tesla

    Correct Answer

    Answer: Option A

  5. Planets do not twinkle because

    (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 a 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

    Correct Answer

    Answer: Option D

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

    dimension?

    (A) Pressure and Young’s modulus

    (B) Planck’s constant and Angular momentum

    (C) Impulse and moment of force

    (D) Force and rate of change of linear momentum

    Correct Answer

    Answer: Option C

  7. Sound of frequency below 20 Hz is called

    (A) Audio sounds

    (B) Infrasonic

    (C) Ultrasonic

    (D) Supersonics

    Correct Answer

    Answer: Option B

  8. On a clean glass plate, a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because

    (A) Mercury is a metal

    (B) The density of mercury is greater than that of water

    (C) The cohesion of mercury is greater than its adhesion with glass

    (D) The cohesion of water is greater than its adhesion with glass

    Correct Answer

    Answer: Option C

  9. Sound travels at the fastest speed in

    (A) Steel

    (B) Water

    (C) Air

    (D) Vacuum

    Correct Answer

    Answer: Option A

  10. Superconductors are substances which

    (A) Conduct electricity at low temperature

    (B) Offer high resistance to the flow of current

    (C) Offer no resistance to the flow of electricity

    (D) Conduct electricity at high temperatures

    Correct Answer

    Answer: Option C

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