Question # 1

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

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If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.

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30 m

15 m

1 m

28 m

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

the velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

The distance between two consecutive crest is called.

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Displacement

Amplitude

Wave front

Wavelength

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

In transverse waves the particles of medium vibrate

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Along the direction of wave

Opposite to direction of wave

Perpendicular to direction of wave

Slowly

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

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61 ms-1

0.61 ms-1

161 ms-1

261 ms-1

Sound travel faster in

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CO2

H2

O2

He

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Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers

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