Sounds waves and Motion MCQ question and answer with solution

41

Vibration of which among the following produces only odd harmonics?

A) A vibrating rod fixed at two ends B) A vibrating string fixed at two ends C) An air column in a closed organ pipe D) An air column in an open organ pipe

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Answer & Solution

Answer: Option C

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42

A sound wave has a frequency of 3.5 kHz and its wavelength is 0.1 m. So how much time required to cover a distance of 700 meters?

A) 1.5 seconds B) 1 second C) 3.0 seconds D) 2.0 seconds

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Answer & Solution

Answer: Option D

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43

Diffraction effect are more easily defected in case of a sound wave than light waves because

A) sound wave are longitudinal B) sound waves have smaller wavelength C) sound waves have larger wavelength D) Sound waves are transverse

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Answer & Solution

Answer: Option C

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44

In which medium, velocity of sound is maximum?

A) Metals B) Air C) Water D) Polymer

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Answer & Solution

Answer: Option A

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45

Statement I Sound waves can travel through vacuum.
Statement II Light is an electromagnetic wave and can travel through vacuum.

A) Both the statements are true and statement II is the correct explanation of statement I B) Both the statements are true, but statement II is not the correct explanation of statement I C) Statement I is true, but statement II is false D) Statement I is false, but statement II is true

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Answer & Solution

Answer: Option D

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46

If the frequency of a sound wave is increased at a given velocity, what is the effect on its wavelength?

A) The wavelength will continue to increase and decrease gradually B) Its wavelength will increase C) There will be no effect on the wavelength D) Its wavelength will decrease

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Answer & Solution

Answer: Option D

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47

What is the frequency of the wave if the time interval of the vibrating object is 0.04 seconds?

A) 250 Hz B) 25 Hz C) 20 Hz D) 200 Hz

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Answer & Solution

Answer: Option B

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48

The frequency of an ultrasonic sound wave is greater than . . . . . . . .

A) 2000 Hz B) 20 Hz C) 200 Hz D) 20000 Hz

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Answer & Solution

Answer: Option D

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49

In case of a forced vibration, the resonance wave becames very sharp when the

A) restoring force is small B) applied force is small C) quality factor is small D) damping force is small

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Answer & Solution

Answer: Option D

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50

Among the following materials, sound travels fastest in

A) steel B) air C) vacuum D) water

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Answer & Solution

Answer: Option A

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Sounds waves and Motion MCQ question and answer with solution | Physics Gk MCQs