Question: In summer, sometimes the bicycle tube bursts because inside the tube
1. Weight of the air increases
2. Pressure of the air increases
3. Pressure of the air decreases
4. Volume of the air decreases
Answer: 2
Question: The clear sky looks blue because of
1. Reflection of light
2. Refraction of light
3. Diffraction of light
4. Dispersion of light
Answer: 3
Question: ‘Manometer’ is the instrument used to measure
1. Pressure of gases
2. Velocity of sound
3. Humidity of atmosphere
4. Density of liquids
Answer: 1
Question: Lightning conductor was discovered by
1. Graham bell
2. Lord Lister
3. Benjamin Franklin
4. Albert Einstein
Answer: 3
Question: The flash of lightning is seen before hearing its thunder because
1. Thunder is more near than roaring
2. The light can pass through vacuum
3. Speed of light is more than speed of sound
4. Speed of sound is more than speed of light
Answer: 3
Question: Air exerts pressure
1. Only downward
2. Only upward
3. In all direction
4. None
Answer: 1
Question: Freely suspended magnetic needle stands in which direction?
1. North-West direction
2. North-South direction
3. North-East direction
4. South-West direction
Answer: 2
Question: Light waves are-
1. Mechanical waves
2. Longtitudinal waves
3. Electromagnetic waves
4. None of the above
Answer: 3
Question: Sound above what level (in decibels) is considered hazardous noise pollution ?
1. 30 dB
2. 40 dB
3. 60 dB
4. 80 dB
Answer: 4
Question: ‘Higgs Boson’ is –
1. Name of a film
2. An elementary particle
3. Generic name of a madicine
4. Planet
Answer: 2
Question: For the same Kinetic energy, the momentum shall be maximum for –
1. Electron
2. Proton
3. Deuteron
4. Alpha Particle
Answer: 4