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Physics MCQs Quiz For Entry Test
1. Interference can be produced with the help of two independent sources if the waves coming from them have same:
Amplitude
Phase (Answer)
Time period
Wavelength
2. A train while whistling moves with a speed thrice the speed of sound away from a stationary listener. Then frequency of sound waves heard by the listener will become:
One-third
4 times
3 times
One-fourth (Answer)
3. It is desired to increase the frequency of a vibrating string from 50 hertz to 200 hertz. This can be done by increasing the tension of the string:
16 times (Answer)
None of these
8 times
4 times
4. Principle of superposition of waves uses the property of ---------- for displacements of waves.
Division
Multiplication
Addition (Answer)
None of these
5. The distance covered by the wave during one period is called its:
Time period
Wave number
Frequency
Wavelength (Answer)
6. It becomes difficult to recognize beats when the difference between the frequencies of two sounds is more than:
6 Hz
5 Hz
10 Hz (Answer)
2 Hz
7. Which of the following is not the mechanical wave?
None of them (Answer)
Sound wave
Light wave
Waves produced in a spring
8. Which of the following is/are examples of mechanical waves i.e. waves generated in:
Coil of spring
Rope
Water
All of them (Answer)
9. Two identical tuning forks emitting sound waves in the same direction, will produce --------------
Resonance
Stationary waves
Interference (Answer)
Beats
10. The ratio of the fundamental frequency of an open end closed end organ pipes of the same length is:
1:2
1:1
4:1
2:1 (Answer)
11. The distance equal to half the wavelength is equal to the distance between:
Two nodes
None of these
Either of two (Answer)
Two anti-nodes
12. The waves which propagate out in space due to oscillations of electric and magnetic fields are called:
Electromagnetic waves (Answer)
Matter waves
Mechanical waves
All of them
13. A pulse on a string is inverted when it is reflected from:
A fixed end (Answer)
None of these
A free end
Either of the ends
14. If the difference between the frequencies of the tuning forks is n, then number of beats produced in two seconds are
3n
2n (Answer)
n
4n
15. The waves which propagate through the oscillations of material particles are known as:
Mechanical waves (Answer)
Electromagnetic waves
Any of them
None of them
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