Phy/Che quiz

The number of oscillations per second is called ________.

• Frequency

• Time period

• Amplitude

• None of these

In which of the following instruments is a stretched membrane the vibrating part?

• Flute

• Sitar

• Drum

• All of these

The to and fro motion of an object is known as ______.

• Vibration

• Oscillation

• Both of these

What is the name of the musical instrument which is made using a hollowed out coconut shell.

• Ghatam

• Ektara

• Manjira

• All of these

Which is your most favorite horror movie?

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Sound cannot travel through _______.

• Vaccum

• Solid

• Liquid

• Gas

In humans, sound is produced by the _______.

• Vocal cords

• Ears

• Nose

• None of these

Frequency is expressed in a unit Known as ______.

• Hertz (Hz)

• Decibel (Db)

• Hertz (Hq)

• None of these

For humans the hearing range is ______ to ______.

• 20 Hz to 20 kHz

• 10 Hz to 10 kHz

• 30 Hz to 30 kHz

Presence of unwanted noise in the environment is known as _______.

• Air pollution

• Water pollution

• Food pollution

• Noise pollution