Physics Chapter 8 Waves Mcqs Test Online Punjab 11th Class 

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Question 1 of 13

Physics

1. 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 1 of 13

Question 2 of 13

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

That of the individual waves

Same as that of the individual waves

Half that of the individual waves

Twice that of the individual waves

Question 2 of 13

Question 3 of 13

3. 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

Frequency

Both Frequency and Speed

Question 3 of 13

Question 4 of 13

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

Neither density nor pressure

Both pressure and density

Density only

Pressure only

Question 4 of 13

Question 5 of 13

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

Density

Temperature

Pressure

Humidity

Question 5 of 13

Question 6 of 13

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

Polarization

Reflection

Diffraction

Interference

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:

Remains constant

Increases

Decreases

It needs some more information

Question 7 of 13

Question 8 of 13

8. 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

Doubled

Constant

One fourth

Question 8 of 13

Question 9 of 13

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

Velocity

All the above

Frequency

Wavelength

Question 9 of 13

Question 10 of 13

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

π

2π

π/2

0

Question 10 of 13

Question 11 of 13

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

Longitudinal wave

Stationary wave

Progressive wave

Transverse wave

Question 11 of 13

Question 12 of 13

12. 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]²

11/10

Question 12 of 13

Question 13 of 13

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

1.0 x 10¹²Hz

1.0 x 10⁹Hz

1.0 x 10¹⁵Hz

1.0 x 10⁶Hz

Question 13 of 13

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