Discussion
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- Question
For an object, the state of rest is considered to be the state of ______ speed.
Options- A. increasing
- B. B)
- C. inverse
- D. zero
- Correct Answer
- zero
- 1. 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
- 2. What is the SI unit of Power?
Options- A. Boyle
- B. Watt
- C. Newton
- D. Pascal Discuss
- 3. What is the SI unit of heat energy?
Options- A. Joule
- B. Newton
- C. Calorie
- D. Kelvin Discuss
- 4. Which among the following determines the pitch of a sound?
Options- A. Amplitude
- B. Frequency
- C. Loudness
- D. Wavelength Discuss
- 5. Which compressor is usually used in AC?
Options- A. Centrifugal
- B. Rotary
- C. Reciprocating
- D. Axial Discuss
- 6. Instrument for measuring low temperatures is called
Options- A. Diagometer
- B. Cryometer
- C. Chromatoptometer
- D. Cymometer Discuss
- 7. The antiparticle of an electron is
Options- A. Positron
- B. Proton
- C. Alpha particles
- D. Beta particles Discuss
- 8. 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
- 9. Reflection from a smooth surface like that of a mirror is called ___________ reflection.
Options- A. regular
- B. irregular
- C. diffused
- D. fused Discuss
- 10. 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
Physics problems
Search Results
Correct Answer: Refraction
Correct Answer: Watt
Correct Answer: Joule
Correct Answer: Frequency
Correct Answer: Reciprocating
Correct Answer: Cymometer
Correct Answer: Positron
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.
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