Physics Questions Part - 1
Thursday, 31 January 2019
wind vane
2. Why is ‘Beaufort Scale’ used?
To measure wind velocity
3. What denotes the smallest temperature?
1° on the Kelvin scale
4. A temperature at which both the Fahrenheit and the centigrade scales have the same value?
-40°
5. Angular separation between two colours of the spectrum depends upon which
thing?
Angle of deviation
6. Total internal reflection of light is possible when light enters from which thing?
Water to air
7. What is a suitable unit for expressing electric field strength?
N/C i.e. Newton/Coulomb
8. The unidirectional property of a pn-junction is useful for its use as which thing?
Rectifier
9. Thermal decomposition of alkanes is known as which name?
Cracking
10. Which energy of the electron at absolute zero is called?
Fermi energy
11. What is the wavelength of visible spectrum?
3900-7600 A
12. We cannot see during a fog. why?
Because of scattering of light
13. What is meant by ‘Underwriting’, the term frequently used in financial sector?
Under valuation of the assets.
14. What will be If a pendulum clock be taken from the earth to a revolving artificial satellite?
It will stop altogether
15. Which physical quantities have the same dimensions?
Momentum and impulse
16. What is the situation with increasing unemployment and inflation termed?
Stagflation
17. Who firstly demonstrated experimentally the existence of electromagnetic wave?
Hertz
18. Heating pyrites in air to remove sulphur is known as which name?
Roasting
19. By which impact is Nuclear fission is caused?
Neutron
20. Comets revolve around which body?
Sun
21. Which layer of the earth is believed to have the heaviest mineral materials of highest density?
Central core
22. When milk is churned, how does the cream separate from it?
Due to the centrifugal force
23. Sound travels faster in which thing?
Iron than in air
24. Which reflects back more sunlight as compared to other three?
Land covered with fresh snow
25. What minimum number of non-zero non-collinear vectors is required to produce a zero vector?
3
26. Which mirror is to be used to obtain a parallel beam of light from a small lamp?
Concave mirror
27. If the temperature of a semiconductor rises, what is its resistivity?
Decrease
28. ‘mho’ is the unit of which unit?
Specific resistance
29. In which type of climate does the temperature never rise above 10°C throughout the year?
Tundra Climate
30. What is the product of the time period of a wave and its frequency?
Unity
