Question # 1

Sound waves are not.

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Compressional waves

Transverse waves

Mechnical waves

Low frequency waves

Which have audible range for 2 kHz and 110 kHz.

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Human

Owl

Bat

Dolphin

------------ waves are produced in stretched string.

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Longitudinal wave

Elecromagnetic wave

Transverse wave

None of these

Which of the following animals can respond to highest frquency.

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Bat

Cat

Frog

Dolphin

Which of the following animals can respond to lowest frequency.

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Cat

Cow

Dog

Dolphin

The wavelength of red colour is.

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700 nm

800 nm

900 nm

600 nm

What type of wave does not need matter to travel through.

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Mechaical

Electromagnetic

Sound

Transverse

Which of the followig features of a wave is the number of waves that pass by each second.

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Loudness

Amplitude

Frequncy

Wave speed

An object produce a sound with a frequency of 50 Hz. Find its tiem period.

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0.01 sec

0.03 sec

0.02 sec

0.04 sec

Speed of sound in water is

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1000 ms-1

1500 ms-1

900 ms-1

2000 ms-1

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Science 7th Class English Medium Chapter 9 Online Test MCQs With Answers

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