10th Class Physics MCQS
Micro waves are used in:
Radio
Television
All of these
Mobile phone
Astronauts is space need to communicate with each other by radio links because:
Sound waves have low frequency in space
Sound waves travel very slowly in space.
Sound waves cannot travel in space
Sound waves travel very fast in speace
How does sound travel from its source to your ear?
Byc changes in air pressure
By vibration in wires or strings
By electromagnetic waves
By infrared waves
Radio waves are:
All of these
Longitudinal waves
Transverse waves
Electromagnetic waves
The product of frequency and wavelength is equal to:
Wave speed
Amplitude
Time period
Wave energy
What is fitted in telephone receiver:
Both a and b
Electromagnet
None
Diaphragm
To hear echo, the distance between the observer and the obstacle is 17m then how much distance will the sound travel?
60m
34m
17m
54m
The S.I unit of intensity of sound is:
Wm-2
Wm2
Wm
Wm 1
The waves which travel in straight line through space and have strong signals are called:
Light waves
Mechanical waves
Micro waves
Magnet waves
The ration of external force applied on the spring to displacement is called:
Force
Spring constant
Constant
Hooke’s law
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