Physics problems
- 1. Stars which appear single to the naked eye but are double when seen through a telescope are
Options- A. novas and supernovas
- B. binaries
- C. asteroids
- D. quasars Discuss
Correct Answer: binaries
- 2. out of the following, which is not emitted by radioactive substance?
Options- A. Electrons
- B. Electromagnetic radiations
- C. Alpha particles
- D. Neutrons Discuss
Correct Answer: Neutrons
- 3. Identify the vector quantity from the following
Options- A. Heat
- B. Angular momentum
- C. Time
- D. Work Discuss
Correct Answer: Angular momentum
- 4. oil raise up the wick in a lamp. The principle involves
Options- A. the diffusion of oil through the wick
- B. the liquid state of oil
- C. capillary action phenomenon
- D. volatility of oil Discuss
Correct Answer: capillary action phenomenon
- 5. One watt-hour is equivalent to
Options- A. 6.3 x 103 J
- B. 6.3 x 10-7 J
- C. 3.6 x 103 J
- D. 3.6 x 10-3 J Discuss
Correct Answer: 3.6 x 103 J
- 6. Out of the following pairs, which one does not have identical dimension?
Options- A. Moment of inertia and moment of a force
- B. Work and Torque
- C. Angular momentum and Planck's constant
- D. Impulse and Momentum Discuss
Correct Answer: Moment of inertia and moment of a force
- 7. Radiocarbon dating technique is used to estimate the age of
Options- A. rocks
- B. monuments
- C. soil
- D. fossils Discuss
Correct Answer: fossils
- 8. Light from the Sun reaches us in nearly
Options- A. 2 minutes
- B. 4 minutes
- C. 8 minutes
- D. 16 minutes Discuss
Correct Answer: 8 minutes
- 9. Mirage is due to
Options- 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 Discuss
Correct Answer: unequal heating of different parts of the atmosphere
- 10. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
Options- A. increase its life
- B. enable it to withstand higher voltages
- C. increase its electrical conductivity
- D. increase its electrical resistivity Discuss
Correct Answer: increase its electrical conductivity
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