TRUE / FALSE

Question 11 Mark

Percussion instruments produce sound due to the vibration of thin metal strips.

Answer

False. Correct : Percussion instruments produce sound by a vibrating stretched membrane or by vibration of their whole bodies.

Question 21 Mark

Sounds below $50\ dB$ cause noise pollution arid are harmful.

Answer

False. Correct : Sounds above $80\ dB$ can cause noise pollution and are harmful.

Question 31 Mark

Music has a disturbing effect on health and behaviour of a person.

Answer

False. Correct : Noise has a disturbing effect on health and behaviour of a person.

Question 41 Mark

A flute produces sound due to vibration of air column inside it.

Answer

True

Question 51 Mark

The pitch of a stringed instrument depends on the tension in the string.

Answer

True

Question 61 Mark

Pitch of a sound depends on its frequency.

Answer

True

Question 71 Mark

The pitch of a sound of string instruments decreases with the decrease in the thickness of the vibrating string.

Answer

False. Correct : The pitch of a sound of string instruments decreases with increase in the thickness of the vibrating string.

Question 81 Mark

A sound with higher amplitude is a soft sound whereas a sound with lower amplitude is loud.

Answer

False. Correct : A sound with higher amplitude is a loud sound whereas a sound with lower amplitude is a soft sound.

PHYSICS TRUE / FALSE