Global positioning system (GPS) consists of earth satellites:
Global positioning system (GPS) consists of earth satellites:
26 | |
23 | |
25 | |
24 |
Physics MCQS
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SI unit of pressure is Pascal, which is equal to:
SI unit of pressure is Pascal, which is equal to:
1 × 10^3 Nm^-2 | |
1 × 10^5 Nm^-2 | |
1 × 10^4 Nm^-2 | |
1 × 10^6 Nm^-2 |
Formula for finding the speed of sound is
Formula for finding the speed of sound is:
f=λv | |
v=fλ | |
f=vλ | |
f=v/λ |
When the frequency of a sound wave is increased, which of the following will decrease?
When the frequency of a sound wave is increased, which of the following will decrease?
i and ii only | |
i only | |
i and iii only | |
iii only |
The wavelength of ultrasonic is
The wavelength of ultrasonic is.
Very large | |
Equal to audible sound waves | |
None of the above | |
Very small |
The speed of ultrasonic is
The speed of ultrasonic is.
Very large | |
Equal to audible sound waves | |
None of the above | |
Very small |
The frequency of ultrasounds is than the frequency of audible sound waves
The frequency of ultrasounds is than the frequency of audible sound waves:
Higher | |
Less and equal | |
Equal | |
Less |
The frequency and amplitude of noisy sound change in a
The frequency and amplitude of noisy sound change in a.
None of the above | |
Irregular manner | |
In a fixed manner | |
Regular manner |
Sound which has jarring effect on our ears is called
Sound which has jarring effect on our ears is called.
Grave sound | |
Music | |
Shrill sound | |
Noise |
For a normal person, audible frequency range lies between
For a normal person, audible frequency range lies between.
25 Hz - 25 KHz | |
30 Hz - 30 KHz | |
10 Hz - 10 KHz | |
20 Hz - 20 KHz |
Astronauts in space need to communicate with each other by radio links because
Astronauts in space need to communicate with each other by radio links because:
sound waves have low frequency in space | |
sound waves cannot travel in space | |
sound waves travel very slowly in space | |
sound waves travel very fast in space |
The speed of sound at 0oC is
The speed of sound at 0oC is:
231ms-1 | |
331ms-1 | |
376ms-1 | |
386ms-1 |
Wm<sup>-2</sup> is the SI unit of:
Wm-2 is the SI unit of:
Wavelength of sound | |
Speed of sound | |
Frequency of sound | |
Intencity of sound |
Which is example of longitudinal waves?
Which is example of longitudinal waves?
Radio waves | |
Water waves | |
Light waves | |
Sound waves |
Which form of energy sound is?
Which form of energy sound is?
Electrical | |
Thermal | |
Chemical | |
Mechanical |
When Compressional waves pass through the air, the molecules of air vibrate.
When Compressional waves pass through the air, the molecules of air vibrate.
Perpendicular to the direction of wave | |
None of the above | |
In the direction of wave | |
Opposite to the direction of wave |
The intensity level of rusting of leaves is:
The intensity level of rusting of leaves is:
10 dB | |
20 dB | |
30 dB | |
40 dB |
The distance between a node and the next antinode is equal to.
The distance between a node and the next antinode is equal to.
1 /4 of wavelength | |
1/2 of wavelength | |
One wavelength | |
1/3 of wavelength |
One bel is equal to:
One bel is equal to:
20 dB | |
10 dB | |
40 dB | |
90 dB |
Frequency of silent whistle lies between.
Frequency of silent whistle lies between.
15KHz to 20KHz | |
Frequency | |
Wavelength | |
25KHz to 20KHz |