8th Class General Knowledge Sample Paper General Knowledge Olympiad Model Test Paper-6

Choose the false one.

(i) Sound needs a medium to travel.

(ii) Pitch of sound increases when the frequency of vibrations increases and vice-versa. Pitch of sound is directly proportional to its frequency.

(iii) Human beings can hear sounds only within 20-20,000 Hz.

(iv) Shrillness of the sound is determined by the frequency of vibration.

A) iv

B) iii

C) ii

D) i

E) None of these

Correct Answer: C

Solution :

Not Available