Physics Chapter 8 Waves Mcqs Test Online Punjab 11th Class 

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Question 1 of 13

Physics

1. 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

Doubled

Halved

One fourth

Question 1 of 13

Question 2 of 13

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

Phase

Velocity

Wave length

Frequency

Question 2 of 13

Question 3 of 13

3. 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:

Increases

Remains constant

Decreases

It needs some more information

Question 3 of 13

Question 4 of 13

4. 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?

Speed

Wavelength

Both Frequency and Speed

Frequency

Question 4 of 13

Question 5 of 13

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

Progressive wave

Transverse wave

Longitudinal wave

Stationary wave

Question 5 of 13

Question 6 of 13

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

1.0 x 10¹⁵Hz

1.0 x 10⁶Hz

1.0 x 10¹²Hz

1.0 x 10⁹Hz

Question 6 of 13

Question 7 of 13

7. 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 7 of 13

Question 8 of 13

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

Polarization

Reflection

Interference

Diffraction

Question 8 of 13

Question 9 of 13

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

That of the individual waves

Twice that of the individual waves

Same as that of the individual waves

Half that of the individual waves

Question 9 of 13

Question 10 of 13

10. 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]²

11/10

Question 10 of 13

Question 11 of 13

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

π/2

2π

0

π

Question 11 of 13

Question 12 of 13

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

Humidity

Pressure

Density

Temperature

Question 12 of 13

Question 13 of 13

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

Frequency

All the above

Velocity

Wavelength

Question 13 of 13

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