Sound-MCQ

1.   Which part of human ear converts sound vibrations into electrical signals

        a. Hammer

        b. Stirrup

        c. Tympanic membrane

        d. Cochlea

2.   What do dolphins, bats and porpoise use

        a. Ultrasound

        b. Infrasound

        c. Both a and b

        d. None of them

3.   Children under the age of 5 can hear upto

        a. 25 Hz

        b. 25k Hz

        c. 20 Hz

        d. 25 kHz

4.   Reverberation of sound is used in

        a. Stethoscope

        b. Trumpets

        c. Megaphone

        d. All of these

5.   To hear a distinct echo each time interval between the original sound and the reflected sound must be:

        a. 0.2 s

        b. 1s

        c. 2s

        d. 0.1 s

6.   Speed (v) abs wavelength ( �) and the frequency (v) of sound are related as

        a. λ= v X v

        b. v= λ X v

        c. v= λ X v

        d. v= λ / v

7.   Speed of sound depends upon

        a. Temperature of the medium

        b. Pressure of the medium

        c. Temperature of source producing sound

        d. Temperature and pressure of medium

8.   Which characteristic is this? We can distinguish between sound having same pitch and loudness.

        a. Tone

        b. Note

        c. Pitch

        d. Timber

9.   Loud sound can travel a larger distance, due to

        a. Higher amplitude

        b. Higher energy

        c. High frequency

        d. High speed

10.   A wave in slinky travelled two and fro in 5 sec the length of the slinky is 5m. What is the velocity of wave?

          a. 10m.s

          b. 5m/s

          c. 2m/s

          d. 25m/s

        1.   D

        2.   A

        3.   B

        4.   D

        5.   D

        6.   C

        7.   A

        8.   D

        9.   B

        10. C