| 1 |
The principle of superposition states that |
The total displacement due to several waves is the sum of the displacement due to those waves acting individually
Two stationary waves superimpose to give two progressive waves
A diffraction pattern consists of many interference patterns superimposed on one another
Two progressive waves superimpose to give a stationary wave
|
| 2 |
Ultra-violet rays differ from X-rays in that they |
Cannot be diffracted
Cannot be polarized
Have a lower frequency
Are deviated when they pass through a magnetic field
|
| 3 |
Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves? |
100 ms<sup>-1</sup>
200 ms<sup>-1</sup>
450 ms<sup>-1</sup>
900 ms<sup>-1</sup>
|
| 4 |
Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse? |
10<sup>3</sup>
10<sup>6</sup>
10<sup>9</sup>
10<sup>12</sup>
|
| 5 |
There is no net transfer of energy by particle of medium in |
Longitudinal wave
Transverse wave
Progressive wave
Stationary wave
|
| 6 |
Through which character we can distinguish the light waves from sound waves |
Interference
Refraction
Polarization
Reflection
|
| 7 |
Decibel is unit of |
Intensity of light
x-ray radiation capacity
sound loudness
Energy of radiation
|
| 8 |
A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is |
2 m
1 m
0.5 m
4 m
|
| 9 |
Sound waves in air always |
Longitudinal
Transverse
Stationary
Electromagnetic
|
| 10 |
The waves moving from a sitar to a listener in air are |
Longitudinal progressive
Longitudinal stationary
Transverse progressive
Transverse stationary
|
| 11 |
The velocity of sound at same temperature is maximum in |
H<sub>2</sub>
N<sub>2</sub>
O<sub>2</sub>
NH<sub>3</sub>
|
| 12 |
It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be |
60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
180<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
|
| 13 |
Two sound waves of slightly different frequencies propagating in the same direction produce beats due to |
Interference
Diffraction
Polarization
Refraction
|
| 14 |
When two progressive waves of nearly same frequencies superimpose and give rise to beats, then |
Frequency of beat changes with time
Frequency of beat changes with location of observer
All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
|
| 15 |
In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is |
Same
2 times
4 times
8 times
|
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