physics general-knowledge question and answers -Page 72

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Physics problems

1. Propagation of sound can be visualised as propagation of ____________ variations in the medium
Options
A. elasticity
B. viscosity
C. density
D. porosity

Discuss

Correct Answer: density

2. Temperature of distant luminous bodies can be determined by
Options
A. Mercury thermometers
B. Gas thermometers
C. Pyrometers
D. Colour thermometers

Discuss

Correct Answer: Pyrometers

3. Choose the most appropriate answer:Sir CV Raman was awarded Noble Prize for his work connected with which of the following phenomenon of radiation?
Options
A. Scattering
B. Diffraction
C. Interference
D. Polarization

Discuss

Correct Answer: Scattering

Explanation:

The Nobel Prize in Physics 1930 was awarded to Sir Chandrasekhara Venkata Raman "for his work on the scattering of light and for the discovery of the effect named after him".

4. Choose the most appropriate answer:In which atmospheric layer are the communication satellites located?
Options
A. Stratosphere
B. Ionosphere
C. Troposphere
D. Mesosphere

Discuss

Correct Answer: Ionosphere

Explanation:

The communication satellites are located in Ionosphere.

5. A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s2 for 4 seconds. Find the displacement (in m) of this body in these 4seconds.
Options
A. 4
B. 72
C. 36
D. 8

Discuss

Correct Answer: 36