Physics Chapter 8 Waves Mcqs Test Online Punjab 11th Class 

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Question 1 of 13

Physics

1. 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

Decreases

Increases

Question 1 of 13

Question 2 of 13

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

Density

Temperature

Humidity

Pressure

Question 2 of 13

Question 3 of 13

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

Velocity

Wavelength

All the above

Frequency

Question 3 of 13

Question 4 of 13

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

Stationary wave

Progressive wave

Transverse wave

Longitudinal wave

Question 4 of 13

Question 5 of 13

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

Reflection

Diffraction

Interference

Polarization

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:

π/2

0

π

2π

Question 6 of 13

Question 7 of 13

7. 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

One fourth

Constant

Halved

Doubled

Question 7 of 13

Question 8 of 13

8. 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

10/9

[11/10]²

Question 8 of 13

Question 9 of 13

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

1.0 x 10¹²Hz

1.0 x 10⁶Hz

1.0 x 10¹⁵Hz

1.0 x 10⁹Hz

Question 9 of 13

Question 10 of 13

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

Neither density nor pressure

Pressure only

Density only

Both pressure and density

Question 10 of 13

Question 11 of 13

11. 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

Wavelength

Speed

Frequency

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

Phase

Velocity

Wave length

Frequency

Question 12 of 13

Question 13 of 13

13. 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 13 of 13

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