Question 1.
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?
A. 50 : 18
B. 25 : 9
C. 3 : 5
D. 5 : 3
Ans: D. 5 : 3
Question 2.
If a band is played on the moon the sound will
A. Reverberate
B. Be heard by us faintly
C. Be heard upto 10km from it
D. Not be heard at any distance at all from it
Ans: D. Not be heard at any distance at all from it
Question 3.
For which of the following substances, the resistance decreases with increase in temperature?
A. Pure silicon
B. Copper
C. Nichrome
D. Platinum
Ans: C. Nichrome
Question 4.
The rate of flow of electric charge is measured in
A. Ampere
B. Coulomb
C. Ampere/coulomb
D. Ampere-coulomb
Ans: A. Ampere
Question 5.
The velocity of sound in air
A. Decreases with increase of temperature
B. Increases with decrease of temperature
C. Does not depend on temperature
D. Decreases with decrease of temperature
Ans: D. Decreases with decrease of temperature
Question 6.
The shape of our milky way galaxy is
A. Circular
B. Elliptical
C. Spiral
D. None of the above
Ans: C. Spiral
Question 7.
The S.I. unit of electric charge is :
A. Ampere
B. Coulomb
C. E.s.u
D. Kelvin
Ans: B. Coulomb
Question 8.
A device which is used to limit the current in an electrical circuit is called a
A. Grid
B. Fuse
C. Hub
D. Conductor
Ans: B. Fuse
Question 9.
Infrasonic sound has a frequency lower than
A. 5 Hz
B. 15 Hz
C. 20 Hz
D. 32 Hz
Ans: C. 20 Hz
Question 10.
The colours of stars depend on their
A. Temperature
B. Distance
C. Radius
D. Atmospheric pressure
Ans: A. Temperature
Question 11.
Indicate the false statement about the resistance of a wire
A. It depends on material of wire
B. It is directly proportional to the length of wire
C. It is directly proportional to the area of cross-section of wire
D. Resistance of metallic wire increases with increase in temperature
Ans: C. It is directly proportional to the area of cross-section of wire
Question 12.
Materials that allow electricity to flow are called
A. Insulators
B. Conductors
C. Electron flows
D. Stimulators
Ans: B. Conductors
Question 13.
When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :
A. Reflection
B. Refraction
C. Forced vibrations
D. Damped vibrations
Ans: C. Forced vibrations
Question 14.
The substance which conducts current in the solid state is
A. Diamond
B. Graphite
C. Iodine
D. Sodium chloride
Ans: B. Graphite
Question 15.
The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A. Avogadro’s law
B. Rault’s law
C. Ohms law
D. Faraday’s law
Ans: C. Ohms law
Question 16.
The fundamental scientific principle in the operation of battery is
A. Acid-base interaction
B. Dialysis
C. Dissociation of electrolytes
D. Oxidation-reduction
Ans: C. Dissociation of electrolytes
Question 17.
Quality of a musical note depends on
A. Fundamental frequency
B. Amplitude of the wave
C. Harmonics present
D. Velocity of sound in the medium
Ans: C. Harmonics present
Question 18.
Electric current is measured by which instrument?
A. Voltmeter
B. Ammeter
C. Barometer
D. Sinometer
Ans: B. Ammeter
Question 19.
What is the SI unit of electric current?
A. Newton
B. Joule
C. Ampere
D. Watt
Ans: C. Ampere
Question 20.
If the current flowing through a circuit is 0.6 A for 6 mins, the amount of electric charge flowing through it is __
A. 360C
B. 216 C
C. 60 C
D. 36 C
Ans: B. 216 C
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
- Physics MCQs Set-7
- Physics MCQs Set-8
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- Physics MCQs Set-48
- Physics MCQs Set-49
- Physics MCQs Set-50
- Physics MCQs Set-51
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- Physics MCQs Set-60
- Physics MCQs Set-61
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- Physics MCQs Set-64
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- Physics MCQs Set-72
- Physics MCQs Set-73
- Physics MCQs Set-74
- Physics MCQs Set-75
- Physics MCQs Set-76
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