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Free gk questions Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. The velocity of sound in a gas depends on
(a)
Amplitude and frequency
(b)
Intensity only
(c)
Density and elasticity of gas
(d)
Wavelength only
2. The wavelength of microwaves is
(a)
Larger than the wavelength of red light
(b)
Larger than the wavelength of radio waves
(c)
Smaller than the wavelength of yellow light
(d)
Smaller than the wavelength of violet light
3. Beta rays emitted by radioactive substance are
(a)
Charged particles emitted by the nucleus
(b)
Electromagnetic radiations
(c)
Electrons orbiting around the nucleus
(d)
None of the above
4. Which of the following electromagnetic waves has the longest wavelength?
(a)
Ultraviolet rays
(b)
Light rays
(c)
Gamma rays
(d)
Infrared rays
5. When two sound waves are superimposed, beats are produced when they have
(a)
Different frequencies
(b)
Different phases
(c)
Different velocities
(d)
Different amplitudes and phases
6. In a stationary wave along a string the strain is
(a)
Maximum at anti nodes
(b)
Maximum of nodes
(c)
Constant every where
(d)
Zero at nodes
7. Ultra violet light of sun’s radiation is prevented from reaching the earth’s atmosphere by the layer of
(a)
Helium
(b)
Ozone
(c)
Hydrogen
(d)
Oxygen
8. The velocity of sound produced by a vibrating body varies
(a)
Inversely as the frequency of the medium
(b)
Directly as the square root of frequency of the medium
(c)
Inversely as the density of the medium
(d)
Directly as the square root of density of the medium
9. Sound waves of wavelength greater than that of audible sound are called
(a)
Seismic waves
(b)
Sonic waves
(c)
Ultrasonic waves
(d)
Infrasonic waves
10. The audible frequency range of a humar ear is
(a)
20 hertz to 200 hertz
(b)
2 hertz to 20 hertz
(c)
20 hertz to 20000 hertz
(d)
200 hertz to 2000 hertz
