Discussion
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- Question
The antiparticle of an electron is
Options- A. Positron
- B. Proton
- C. Alpha particles
- D. Beta particles
- Correct Answer
- Positron
- 1. Instrument for measuring low temperatures is called
Options- A. Diagometer
- B. Cryometer
- C. Chromatoptometer
- D. Cymometer Discuss
- 2. For an object, the state of rest is considered to be the state of ______ speed.
Options- A. increasing
- B. B)
- C. inverse
- D. zero Discuss
- 3. When light passes from one medium to another, this phenomenon of change in its direction is called _____.
Options- A. Refraction
- B. Diffraction
- C. Propagation
- D. No option is correct Discuss
- 4. What is the SI unit of Power?
Options- A. Boyle
- B. Watt
- C. Newton
- D. Pascal Discuss
- 5. What is the SI unit of heat energy?
Options- A. Joule
- B. Newton
- C. Calorie
- D. Kelvin Discuss
- 6. If the mass of an object is 60 kgs, what will be its weight on the moon? (N=Newton)
Options- A. 60N
- B. 600N
- C. 100N
- D. 10N Discuss
- 7. Reflection from a smooth surface like that of a mirror is called ___________ reflection.
Options- A. regular
- B. irregular
- C. diffused
- D. fused Discuss
- 8. Which best describes how air moves during convection?
Options- A. cool air falls down
- B. warm air falls down
- C. cool air is replaced by warm air
- D. air always falls down Discuss
- 9. Pick out the only vector quantity
Options- A. pressure
- B. impulse
- C. gravitational potential
- D. co-efficient of friction Discuss
- 10. The electrical domestic tube light gives white fluorescent light because of
Options- A. colision between molecules of filled gas under electric current
- B. heavy current
- C. vacuum inside the tube
- D. falling of ultra violet rays on the white inner coating of the tube Discuss
Physics problems
Search Results
Correct Answer: Cymometer
Correct Answer: zero
Correct Answer: Refraction
Correct Answer: Watt
Correct Answer: Joule
Correct Answer: 100N
Correct Answer: regular
Correct Answer: cool air falls down
Explanation:
During convection, cool and dense air falls through the warmer and less dense air. The warm air having less mass is being displaced by the cooler which is much heavy. Convection always involves the air rising through the atmosphere.
Correct Answer: impulse
Correct Answer: falling of ultra violet rays on the white inner coating of the tube
Explanation:
The ultraviolet rays have high frequency and shorter wavelength are converted to visible white light with lower frequency and greater wave length
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