Physics Questions Part - 4
Sunday, 3 February 2019
Rotation of Earth
2. In which the radiant energy of the sun is transmitted?
Short waves
3. When can one record the lowest temperature of air?
Just before sunrise
4. What happens when the water content in the atmosphere?
Decreases as temperature increases
5. What does the rusting of iron nail?
Increases its weight
6. When light passes from air into glass it experiences change in which things?
Wavelength and speed
7. Which types of light are strongly absorbed by plants?
Blue and red
8. When two bodies stick together after the collision, what this is said?
Completely inelastic
9. What is the quantity that remains unchanged in a transformer?
Frequency
10. Why is In a hydel station the motion produced in turbines?
Due to the flow of
water
11. Which is useful in the detection of landmines?
Wasp
12. Which instrument used to measure the force and velocity of the wind?
Anemometer
13. What is most suitable for the core of an electromagnet?
Soft iron
14. A convex mirror makes a good rear-view mirror for a car. Why?
It forms erect, reduced images
15. For the measurement of temperature of the order of 400°C, what will we prefer?
Thermocouple
16. If the current in the core decreases, what will the strength of the magnetic field be?
Decreases
17. What is the commonly used unit for measuring the speed of data transmission?
Bits per second
18. The change in temperature of a body is 50°C. What is the change on Kelvin scale?
50 K
19. What is the amount of actual water vapour of air?
Absolute humidity
20. How is Missile ‘Astra’?
A air to air missile
21. What is Electric field intensity at a point a hollow charged spherical conductor?
Is zero
22. With which instrument can a sailor in a submarine see the objects on the surface of sea?
Periscope
23. At absolute zero temperature, what will be the kinetic energy of the molecules?
Zero
24. Which is the instrument that measures air pressure?
Barometer
25. By whom was the quantum theory first enunciated?
By Max Planck
26. If a proton of mass m is moving with velocity of light, how will its mass?
Unchanged
27. A hydrogen atom is paramagnetic. What is a hydrogen molecule?
Diamagnetic
28. Which type of rainfall is often accompanied with lightning and thunder?
Convectional
29. What is the approximate velocity of light per second?
3 × 108 m
30. Why are Clear nights cooler than cloudy nights?
Because of radiation
