Physics MCQs GK objective Questions GK test Set – 26

Question 1.

Which phenomenon is responsible for the echo of

sound wave?

A. Reflection
B. Refraction
C. Interference
D. Polarisation

Ans: A. Reflection

Question 2.

Echolocation is an adaptation bats use to

A. Locate flowering plants
B. Hunt insects in flight
C. Find warm places for hibernation
D. All of the above

Ans: D. All of the above

Question 3.

Speed of sound in air is unaffected by change in

A. Pressure
B. Humidity
C. Temperature
D. Volume

Ans: A. Pressure

Question 4.

Loudness of sound depends on

A. Frequency
B. Wavelength
C. Amplitude
D. Pitch

Ans: C. Amplitude

Question 5.

Bats can sense obstacles because they produce

A. Supersonic sound waves
B. Ultrasonic sound waves
C. Infrasonic sound waves
D. Micro sound waves

Ans: B. Ultrasonic sound waves

Question 6.

RADAR is used for

A. Detecting and locating the position of objects such as Aeroplanes
B. Locating submerged submarines
C. Locating geostationary satellites
D. Receiving a signals in a radio receiver

Ans: A. Detecting an A. Detecting and locating the position of objects such as Aeroplanes

Question 7.

Which one of the following animals can hear

ultrasonic sound ?

A. Rat
B. Squirrel
C. Cat
D. Bat

Ans: D. Bat

Question 8.

A wavelength of 0.3 m is produced in air and it

travels at a speed of 300 m/s. Then it will be an

A. Audible wave
B. Infrasonic wave
C. Ultrasonic wave
D. Microwave

Ans: A. Audible wave

Question 9.

What is the minimum distance (in metres) required to

hear an echo?

A. 10
B. 13
C. 17
D. 21

Ans: C. 17

Question 10.

The instrument which uses sound waves to measure the

depth of oceans is

A. Radar
B. Sonar
C. Altimeter
D. Venturimeter

Ans: B. Sonar

Question 11.

Which term is not associated with sound wave?

A. Hertz
B. Decibel
C. Candela
D. Mach

Ans: C. Candela

Question 12.

Sound travels fastest in

A. Vacuum
B. Air
C. Glass
D. Water

Ans: C. Glass

Question 13.

Megahertz is a measurement of

A. Frequency
B. Speed
C. Wavelength
D. Capacity

Ans: A. Frequency

Question 14.

Velocity of sound in air does not depend on

A. Density of air
B. Temperature of air
C. Pressure of air
D. Humidity of air

Ans: C. Pressure of air

Question 15.

Which among the following determines the pitch of a

sound?

A. Amplitude
B. Frequency
C. Loudness
D. Wavelength

Ans: B. Frequency

Physics GK MCQs all set

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