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- Question
The basic reason for the extraordinary sparkle of suitably cut diamond is that
Options- A. it has well defined cleavage planes
- B. it has a very high transparency
- C. it has a very high refractive index
- D. it is very hard
- Correct Answer
- it has a very high refractive index
- 1. Air pressure is usually highest when the air is
Options- A. warm and moist
- B. cool and dry
- C. warm and dry
- D. cool and moist Discuss
- 2. Formation of shadows can be explained by
Options- A. rectilinear propagation of light
- B. reflection
- C. refraction
- D. total internal reflection Discuss
- 3. The core of an electromagnet is made of soft iron because soft iron has
Options- A. small susceptibility and small retentivity
- B. large susceptibility and small retentivity
- C. large density and large retentivity
- D. small density and large retentivity Discuss
- 4. Ultrasonic waves are used for stirring liquid solutions because they
Options- A. do not produce noise during the operation
- B. are easy to produce
- C. can produce perfectly homogeneous solutions
- D. do not produce chemical reactions in the solution Discuss
- 5. What is the SI unit of pressure
Options- A. Pascal
- B. Dyne
- C. Newton
- D. Jule Discuss
- 6. The minimum number of Non zero non collinear vectors required to produce a zero vector is
Options- A. 3
- B. 2
- C. 4
- D. 1 Discuss
- 7. To produce deflection in a television picture tube:
Options- A. an electric field is used
- B. a magnetic field is used
- C. both electric and magnetic field are used
- D. none of the above Discuss
- 8. Which is best used as a sound absorbing material in partition walls ?
Options- A. Stone chips
- B. Steel
- C. Glass - wool
- D. Glass pieces Discuss
- 9. Masses of stars and galaxies are usually expressed in terms of
Options- A. neutron mass
- B. earth's mass
- C. solar mass
- D. lunar mass Discuss
- 10. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
Options- A. will increase
- B. will decrease
- C. does not change
- D. varies with the increase of depth of the immersion of the iron piece Discuss
Physics problems
Search Results
Correct Answer: cool and moist
Correct Answer: rectilinear propagation of light
Explanation:
In this position, the head light will be at the principal focus so that the rays of light falling on the cancave mirror will be rendered parallel
Correct Answer: large susceptibility and small retentivity
Correct Answer: can produce perfectly homogeneous solutions
Correct Answer: Pascal
Correct Answer: 3
Correct Answer: a magnetic field is used
Correct Answer: Glass - wool
Explanation:
Materials that do not transfer mechanical energy well. These tend to be soft,flexible, low density, and with high surface area to linear area ratios.
Correct Answer: solar mass
Correct Answer: will increase
Explanation:
When the piece of iron is lowered into the water, the water level in the bucket increases. And so the pressure at the bottom of bucket also increases. Thus the total thrust at the botto also increases. Therefore the spring balance reading increases.
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