Physics GK 15 - Mechanical & Electromagnetic Waves

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1).
What do we call the wave if the constituents of the medium oscillate perpendicular to the direction of wave propagation?
2).
Which of the following is correct about transverse mechanical waves?
3).
What kinds of waves are the ultrasonic waves in air produced by a vibrating quartz crystal?
4).
What is wavelength of a wave?
5).
What is the S.I unit of the propagation constant?
6).
For which of the following waves the Doppler effect holds true?
7).
Which of the following are the areas of application of Doppler's effect?
8).
What is the wavelength of a stationary wave?
9).
Which of the following is correct about the electromagnetic waves?
10).
What is the speed of electromagnetic waves in vacuum?
11).
Which of the following produces Electromagnetic waves?
12).
What is the direction of electric and magnetic fields in an electromagnetic wave?
13).
What is the wavelength range of Radio waves?
14).
Which of the following electromagnetic waves are produced due to the radioactive decay of the nucleus?
15).
Which of the following electromagnetic waves in the EM spectrum has the shortest frequency?
16).
Which of the following electromagnetic waves in the EM spectrum has the highest wavelength?
17).
Which of the following waves is produced when inner shell electrons in atoms move from one energy level to a lower level?
18).
What part of the electromagnetic spectrum is detected by the human eye?
19).
What is the wavelength range of ultraviolet rays?
20).
What is the difference of two close frequencies of superimposing waves known as?
21).
Which of the following is correct about mechanical waves?
22).
Which of the following is NOT a mechanical wave?
23).
In which of the following mediums can sound waves travel?
24).
Which of the following waves are also called as heat waves?
25).
Which of the following represents the total momentum transferred to a surface by an electromagnetic wave?
26).
Which of the following waves is absorbed by the ozone layer present in the atmosphere?
27).
What kind of waves are produced in a cylinder containing a liquid by moving its piston back and forth?
28).
What is the relation between Time period(T) and angular frequency(ω) of a wave?
29).
What is the relation between frequency(ν) and angular frequency(ω) of a wave?
30).
Which of the following eaves will be produced on bombarding a metal target by high energy electrons?
1. What do we call the wave if the constituents of the medium oscillate perpendicular to the direction of wave propagation?
[A] Transverse wave
[B] Longitudinal wave
[C] Electromagnetic wave
[D] Matter wave
2. Which of the following is correct about transverse mechanical waves?
[A] they can travel through solids and gases
[B] they can travel through solids but not liquids
[C] they can travel through solids and liquids
[D] they can travel through gases but not solids
3. What kinds of waves are the ultrasonic waves in air produced by a vibrating quartz crystal?
[A] Transverse
[B] Longitudinal
[C] Transverse and longitudinal
[D] None of the above
4. What is wavelength of a wave?
[A] square of the distance between two points having the same phase
[B] maximum distance between two points having the same phase
[C] minimum distance between two points having the same phase
[D] None of the above
5. What is the S.I unit of the propagation constant?
[A] radian metre
[B] radian per metre
[C] radian per second
[D] radian per centimetre
6. For which of the following waves the Doppler effect holds true?
[A] Sound waves
[B] Electromagnetic waves
[C] Both a and b
[D] None
7. Which of the following are the areas of application of Doppler’s effect?
[A] At airports to guide aircraft
[B] in the military to detect enemy aircraft
[C] Sonography
[D] All of the above
8. What is the wavelength of a stationary wave?
[A] twice the distance between two consecutive nodes or antinodes
[B] equal to the distance between two consecutive nodes or antinodes
[C] half the distance between two consecutive nodes or antinodes
[D] four times the distance between two consecutive nodes or antinodes
9. Which of the following is correct about the electromagnetic waves?
[A] They require a solid medium to travel
[B] They can travel through vacuum
[C] Electromagnetic waves can only travel through gases
[D] None of the above
10. What is the speed of electromagnetic waves in vacuum?
[A] 1000 m/s
[B] 3 x 108 m/s
[C] 300000 m/s
[D] Different for different waves
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