StudentAidUnit 7: Unit 7: Waves and Vibrations — Mcqs
11th Class Physics · Unit 7: Waves and Vibrations
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Multiple Choice Questions
1.The simple wave speed equation is represented by:
2.The principle of superposition in waves is stated as:
3.A node in a stationary wave is:
4.An antinode in a stationary wave is:
5.Stationary waves are defined as:
6.Harmonics are:
7.The result of constructive interference between two waves is represented as:
8.If the amplitude of the wave is tripled, then the amount of energy is increased by:
9.What type of waves do headphones use to produce sound?
- a Electromagnetic waves
- b Mechanical waves
- c Pressure waves
- d Longitudinal waves
10.The typical frequency range of microwaves is:
- a 10^3-10^5 Hz
- b 10^5-10^7 Hz
- c 10^7-10^9 Hz
- d 10^9-10^11 Hz
11.The bending of waves around an obstacle is called as:
12.The Doppler Effect used in astronomy is for:
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Longitudinal waves
1.The compressions and elongations are formed in:
2.The particles of medium in longitudinal wave vibrate direction of propagation:
Transverse waves
3.Crests and troughs are formed in:
4.In transverse waves, the particles vibrate:
- a Parallel
- b Perpendicular
- c Opposite
- d Anti-Parallel
5.Transverse waves can't be produced in:
- a metals
- b solids
- c fluids
- d gas
6.Portion of the transverse waves above the mean position is:
7.The distance between two consecutive troughs is:
8.The portion of wave below the mean position is called:
Standing waves
9.A one-meter-long string establishes two loops, waves length of the wave is.
- a 1m
- b 0.5 m
- c 0.25 m
- d 2 m
10.Waves produced over strings are:
11.Open end of an organ pipe act as:
12.At the closed end of an air column there exist:
13.The distance between two consecutive antinodes is:
14.The number of nodes between two consecutive antinodes are:
15.The point of maximum displacement on stationary wave is:
16.Energy is not carried by:
17.A set of frequencies which are multiples of the fundamental frequency are called:
18.If a string is fixed at both ends vibrates in "n" loops, then wave-length in term of length '/' of string, is given by:
19.If number of nodes in open end organs pipes are 'N' then the number of antinodes are:
20.A stationary wave is established in a string which vibrates in four segments at a frequency of 120 Hz. Its fundamental frequency is:
21.If a stretched string is 4m and it has 4 loops of stationary waves, then wavelength is:
22.When one end of organ pipe is closed, then the frequency of stationary waves of any harmonic in it is given by:
23.Distance between adjacent node anti node is:
24.Ratio of the fundamental frequency of an open end and closed end organ pipe of same length is:
25.If amplitude of wave is doubled the energy becomes:
Diffraction
26.Two light waves which are not coherent cannot be:
27.Diffraction effect is:
- a More for a round edge
- b Less for a round edge
- c More for a sharp edge
- d Less for a blunt edge
28.We get light inside a room in a day time due to:
Wave equation
29.If 20 waves pass through medium in one second with a speed of 20m/sec than wavelength is:
30.If 30 waves per second pass through a medium at speed of 30ms^-1, the wavelength is:
31.The wavelength in terms of frequency and speed is:
Beats
32.In order to produce beat, the two sound waves should have:
33.Beats can be heard when difference of frequency is not more than:
34.The beats are result of:
- a Interference
- b Destructive interference
- c Constructive and destructive interference
- d Superposition
Interference of waves
35.The path difference is an odd integral multiple of half wavelength is for:
36.The path difference is an integral multiple of wavelength in:
37.Two identical waves moving in same direction produce:
Velocity of transverse waves
38.If the tension of a stretched string is made four times, then the velocity of wave:
Types of waves
39.In the formula √(F/m) for finding the speed of transverse wave in the string, the unit of m is SI is:
40.The waves produced due to oscillation of electric and magnetic fields are:
41.High frequency radio waves used in radars travel in water.
42.Example of mechanical way is:
43.The wave is used to transfer:
44.The ripple tank is used to study various features of:
45.Which one of the following medium can transmit both transverse and longitudinal waves?
- a Solid
- b Liquid
- c Gas
- d Both a & b
Applications of Doppler effect
46.Radar system is an application of: