Physics Chapter 8 Waves Mcqs Test Online Punjab 11th Class 

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Question 1 of 13

Physics

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

Velocity

All the above

Wavelength

Frequency

Question 1 of 13

Question 2 of 13

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

1.0 x 10¹⁵Hz

1.0 x 10¹²Hz

1.0 x 10⁹Hz

1.0 x 10⁶Hz

Question 2 of 13

Question 3 of 13

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

Half that of the individual waves

Same as that of the individual waves

That of the individual waves

Twice that of the individual waves

Question 3 of 13

Question 4 of 13

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

Diffraction

Polarization

Reflection

Interference

Question 4 of 13

Question 5 of 13

5. 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?

Both Frequency and Speed

Speed

Wavelength

Frequency

Question 5 of 13

Question 6 of 13

6. 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

11/10

[11/10]²

10/9

Question 6 of 13

Question 7 of 13

7. 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

Remains constant

Increases

Decreases

Question 7 of 13

Question 8 of 13

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

Density only

Pressure only

Both pressure and density

Neither density nor pressure

Question 8 of 13

Question 9 of 13

9. 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

Halved

One fourth

Constant

Doubled

Question 9 of 13

Question 10 of 13

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

Wave length

Phase

Frequency

Velocity

Question 10 of 13

Question 11 of 13

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

Humidity

Density

Temperature

Pressure

Question 11 of 13

Question 12 of 13

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

Stationary wave

Longitudinal wave

Transverse wave

Progressive wave

Question 12 of 13

Question 13 of 13

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

2π

π

π/2

0

Question 13 of 13

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