Physics Chapter 8 Waves Mcqs Test Online Punjab 11th Class 

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Question 1 of 13

Physics

1. A sounding source and a listener are both at rest relative to each other. If wind blows from the listener towards the source, then which one of the following of sound will change?

Frequency

Both Frequency and Speed

Wavelength

Speed

Question 1 of 13

Question 2 of 13

2. When sound waves travel from air to water which of these remain constant?

Velocity

Frequency

All the above

Wavelength

Question 2 of 13

Question 3 of 13

3. Which one of the following properties is not exhibited by the longitudinal waves?

Diffraction

Polarization

Reflection

Interference

Question 3 of 13

Question 4 of 13

4. A sound source is moving towards stationary listener with 1/10th of the speed of sound. The ration of apparent of real frequency is

[9/10]²

10/9

11/10

[11/10]²

Question 4 of 13

Question 5 of 13

5. Which one of the following could be the frequency of ultraviolet radiation?

1.0 x 10⁶Hz

1.0 x 10¹²Hz

1.0 x 10⁹Hz

1.0 x 10¹⁵Hz

Question 5 of 13

Question 6 of 13

6. When a transverse wave is reflected from the boundary of a denser to a rarer medium, it under goes a phase change of:

0

π

2π

π/2

Question 6 of 13

Question 7 of 13

7. When a stationary wave is formed then its frequency is:

That of the individual waves

Same as that of the individual waves

Twice that of the individual waves

Half that of the individual waves

Question 7 of 13

Question 8 of 13

8. Which of the following changes at an antinode in a stationary wave?

Pressure only

Neither density nor pressure

Both pressure and density

Density only

Question 8 of 13

Question 9 of 13

9. A water wave move in two dimensions from the source point and at a far distance the curvature of the wave front becomes plane. As the wave proceeds the energy carried by the wave:

It needs some more information

Increases

Remains constant

Decreases

Question 9 of 13

Question 10 of 13

10. Which one of the following factors has no effect on the speed of sound in gas?

Pressure

Temperature

Humidity

Density

Question 10 of 13

Question 11 of 13

11. If the tension in the string is doubled and its mass per unit length is reduced to half. Then the speed of transverse wave on it is

Constant

Halved

One fourth

Doubled

Question 11 of 13

Question 12 of 13

12. There is no net transfer of energy by particles of medium in.

Longitudinal wave

Stationary wave

Transverse wave

Progressive wave

Question 12 of 13

Question 13 of 13

13. When a wave goes from one medium to another medium, which one of the following characteristics of the wave remains constant

Wave length

Frequency

Phase

Velocity

Question 13 of 13

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