Physics Chapter 8 Waves Mcqs Test Online Punjab 11th Class 

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Question 1 of 13

Physics

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

Density only

Pressure only

Neither density nor pressure

Both pressure and density

Question 1 of 13

Question 2 of 13

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

10/9

[9/10]²

11/10

[11/10]²

Question 2 of 13

Question 3 of 13

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

2π

0

π/2

π

Question 3 of 13

Question 4 of 13

4. 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:

Decreases

Remains constant

It needs some more information

Increases

Question 4 of 13

Question 5 of 13

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

Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

Question 5 of 13

Question 6 of 13

6. 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

Speed

Wavelength

Both Frequency and Speed

Question 6 of 13

Question 7 of 13

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

1.0 x 10⁶Hz

1.0 x 10⁹Hz

1.0 x 10¹²Hz

1.0 x 10¹⁵Hz

Question 7 of 13

Question 8 of 13

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

Temperature

Pressure

Humidity

Density

Question 8 of 13

Question 9 of 13

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

All the above

Wavelength

Velocity

Frequency

Question 9 of 13

Question 10 of 13

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

Same as that of the individual waves

That of the individual waves

Twice that of the individual waves

Half that of the individual waves

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

Frequency

Wave length

Velocity

Phase

Question 12 of 13

Question 13 of 13

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

Interference

Reflection

Polarization

Diffraction

Question 13 of 13

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