Engineering Physics I Mock Test 7

10%

Question 1 of 10

1. If wave y=Acos(ωt+kx) Is moving along x-axis, the shapes of a pulse at t=0 and t=2s.

May not be the same

Unpredictable

Are different

Are same

Question 1 of 10

Question 2 of 10

2. The velocity of sound in any gas depends upon __________

Intensity of sound waves only

Amplitude and frequency of sound

Density and elasticity of gas

Wavelength of sound only

Question 2 of 10

Question 3 of 10

3. The velocity of sound in open ended tube in 330m/s, the frequency of a wave is 1.1 kHz and length of the tube is 30cm, then number of harmonics that it will emit is?

Question 3 of 10

Question 4 of 10

4. When sound travels from air to water, which parameter does not change?

Wavelength

Frequency

Velocity

Temperature

Question 4 of 10

Question 5 of 10

5. Standing waves are produced in 10m long stretched string. If the string vibrates in 5 segments and wave velocity is 20m/s, its frequency is?

10Hz

4Hz

2Hz

5Hz

Question 5 of 10

Question 6 of 10

6. Statement: Sound wave cannot propagate fastest in solids.
Reason: Sound wave can propagate slightly in vacuum.

Both statement and reason are true and the reason is the correct explanation of the statement

Statement is true but the reason is false

Both statement and reason are false

Both statement and reason are true but the reason is not the correct explanation of the statement

Question 6 of 10

Question 7 of 10

7. A source of sound frequency 600Hz is placed inside water. The speed of sound in water is 1500 m/s and in air it is 300 m/s. The frequency of sound is recorded by an observer, who is standing in the air is?

3000 Hz

200 Hz

600 Hz

120 Hz

Question 7 of 10

Question 8 of 10

8. Frequency is used for tuning musical instruments.

False

True

Question 8 of 10

Question 9 of 10

9. The volume of an auditorium is 12,000m³. Its reverberation time is 1.5 seconds. If the average absorption coefficient of interior surfaces is 0.4 Sabine/m². Find the area of interior surfaces.

20,000m²

4500m²

3340m²

450m²

Question 9 of 10

Question 10 of 10

10. An organ pipe, open at both ends produce 5 beats per second when vibrated with a source of frequency 200Hz. The second harmonic of the same pipe produces 10 beats per second with a source of frequency 420 Hz. The frequency of source is?

205Hz

210Hz

195Hz

190Hz

Question 10 of 10