Physics Questions Part - 5

1. What is the growth movement in plant due to light called?
Phototropism
2. Which Indian missile is capable of carrying nuclear weapons?
Prithvi
3. Which Scientists has established the ‘Phylum Annelida’?
Lamark
4. Why are Clear nights colder than cloudy nights?
Because of Radiation
5. Which was India’s first-ever tactical missile?
Agni
6. If a proton of mass m is moving with the velocity of light, what will its mass be?
Infinite
7. Which is the example of ideal black body?
A pin hole box
8. Which laser type is used in a laser printer?
Dye laser
9. How much is one barrel of oil approximately equal to?
159 litres
10. What is the energy of the winds and the waves?
Kinetic
11. On which principle does Rocket work?
Conservation of momentum
12. If the mass of the pendulum is doubled, what will its the time period?
Remains same
13. Wireless communication is reflected back to the earth’s surface by the which zone?
Ionosphere
14. Which are waves moving from a sitar to a listener in air?
L o n g i t u d i n a l progressive
15. By whom are the planets are kept in motion in their respective orbits?
Gravitation and centrifugal force
16. The hydraulic brakes used in automobiles is a direct application of which law?
Pascal’s law
17. In which transmission are sound and video signals transmitted simultaneously?
T.V. Transmission
18. Why is used as coolant in the radiator of a car engine?
Because it has high specific heat
19. In India, who was the first to put forward the theory that the earth revolves round the sun?
Aryabhatta
20. A metal sheet with circular hole is heated. what change will be in the hole?
It will Expand
21. By inserting a soft iron piece into solenoid, what does the strength of the magnetic field?
Increase
22. How is the electric potential at the centre of a charged conductor?
Same as on the surface

23. Who invented the laser?
Charles H. Townes
24. Which alloys is used for making magnets?
Alnico
25. One calorie is the heat required to raise the temperature of 1g of water by how many degrees?
1°C
26. What is the Mode of transmission of heat in which heat carried by a moving particles?
Convection
27. Which electromagnetic radiation is most prevalent in the atmosphere?
Infrared
28. Which scientist shared the Nobel Prize in Physics with his son?
William Henry Bragg
29. The sun is visible a little before the actual sunrise because of which reaction?
Atmospheric refraction
30. In nuclear fission, how many percentage of mass is converted into energy?
0.10%