MCQ Standing Waves, Class 11 Physics

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A node is a point where there is always

Constructive interference

Destructive interference

Double trough

Two crests

Question 1 of 10

2. A cylindrical tube, open at both ends, has a fundamental frequency f in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of the air-column is now:

f/2

f

2f

3f/2

Question 2 of 10

3.

Fundamental note in open pipe (v ₁₌ν/2L) has _________ the frequency of the fundamental note in closed organ pipe (v₂=ν/4L).

Half

Twice

Four times

Thrice

Question 3 of 10

4. Equation of longitudinal stationary waves in the pipe is

A

B

C

D

Question 4 of 10

5. In an experiment to find the speed of waves in a rope, a standing wave pattern is established as shown in diagram below. The vibrating end of rope makes 90 vibrations per minute. The speed of the waves is

4m/s

3m/s

6m/s

2m/s

Question 5 of 10

6. The lowest frequency or fundamental mode for sound vibrating in a pipe closed at one end in terms of its length and velocity of sound is given by

A

B

C

D

Question 6 of 10

7. A standing wave is formed when ____.

air is compressed in a cylinder

two identical waves moving in opposite directions along the same medium interfere

a wave reflects due to changes in the properties of the medium.

a wave reflects off a wall

Question 7 of 10

8. If you blow air over the top of a fairly large drinking straw you can hear a fundamental frequency due to a standing wave being set up in the straw. What happens to the fundamental frequency if while blowing you cut the straw in half with a pair of scissors?

The fundamental frequency remains unchanged

The fundamental frequency decreases

The fundamental frequency increases

Question 8 of 10

9. Sound waves travel in a metallic bar with velocity, v = where is density of the medium and x is the

Young's modulus of sound waves

Young's modulus of the medium

Bulk modulus of the medium

Bulk modulus of sound waves

Question 9 of 10

10. Standing waves result from the superposition of two waves that have:

the same amplitude and frequency and opposite directions of propagation

the same amplitude, slightly different frequencies, and the same direction of propagation

the same amplitude, slightly different frequencies, and opposite directions of propagation

the same amplitude, frequency, and direction of propagation

Question 10 of 10

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