physics test(unit 13 pdf

7/29/2019 Physics Test(Unit 13 PDF

1/6

[Total 17 Marks]

The frequency of the wave is 3Hz. On Fig. 2.1, mark a distance which shows how

Fig. 2.1 shows ripples travelling across the surface of a lake.

Fig. 2.1

......

......

2[Total

1

Date :................................................................................ Class: C2(J

Test (Unit 13)

UNIQUE SCIENCE ACADEMY

Name :............................................................................... Paper: Physics

Time Allowed: 35Minutes Maximum Marks: 25

1

Theory Section:

[Turn o

A tuning fork produces a longitudinal wave of frequency 440 Hz. The wave travels through with a speed of 330 m / s.

(a) Explain what is meant by a longitudinalwave.

......................................................................................................................................

......................................................................................................................................

....................................................................................................................................

(b) Calculate the wavelength of the wave.

wavelength = ............................................ m

(a) What property of the ripples means that a transverse wave motion is formed?

.....................................................................................................................................

.....................................................................................................................................

...............................................................................................................................

(b)the ripples travel in 1 second, and explain how you obtain your answer.

.....................................................................................................................................

...............................................................................................................................

undisturbedsurface

[Total


2/6

Fig. 3.1

Boy A throws a large stone into a large still pond, as illustrated in Fig.3.1.3 [Tota

2

2

[Turn o

Observations of a distant thunderstorm are made.

(a) During a lightning flash, the average wavelength of the light emitted is 5 107 m. light travels at 3 108 m/s.Calculate the average frequency of this light.

frequency = ....................................

(b) The interval between the lightning flash being seen and the thunder being hear3.6 s. The speed of sound in air is 340 m/s.

(i) Calculate the distance between the thunderstorm and the observer.

distance = .....................................

(ii) Explain why the speed of light is not taken into account in this calculation.

............................................................................................................................

............................................................................................................................

AB


3/6

2

20Hz4 Hz1Hz

A surf-board moves at a speed of 10 m/s on the crest of a wave. The distance between wav1

sound wave water wave [1]

8 Marks]MCQ SECTION: [Total

3

[Total: 6]

(a) Girl B hears the plop sound of the stone entering the water a very short time after shesees the splash, but it is many seconds before the water wave reaches the edge of thepond where she is sitting.Use this information to decide which wave travels fastest and which travels slowest.

Write fastest in one box and slowest in another box. Leave one box empty.

sound wave

light wave

water wave [2]

(b) In the boxes below, state whether each type of wave is a transverse or a longitudinalwave.

sound wave

light wave

water wave [3]

(c) In the boxes below, put a tick alongside any of the types of wave that do not need asubstance in which to travel.

light wave

[Turn over

is 10 m.What is the frequency of the wave motion?

A B C D 10Hz

The diagram shows the cross-section of a water wave.

Which distance is the amplitude of the wave?

A

B

D

C


4/6

4

3

4

[Turn o

A drop of water from a tap falls onto the surface of some water of constant depth.

Water waves spread out on the surface of the water.

Which statement is true?

A The waves are longitudinal and travel at the same speed in all directions.

B The waves are longitudinal and travel more quickly in one direction than in others.

C The waves are transverse and travel at the same speed in all directions.

D The waves are transverse and travel more quickly in one direction than in others.

view from above

A student measures how far a cork moves up and down on a wave in a tank of water.

Which quantity can he obtain from his measurement?

A amplitude

B frequency

C speed

D wavelength

ruler

cork

directionof wave


5/6

6

5

5

[Turn o

Water waves change direction when they move from shallow water to deep water.

shallowwater

deepwater

original

wave

direction

new wave

direction

What is the name of this effect?

A diffraction

B dispersion

C reflection

D refraction

A vertical stick is dipped up and down in water at P. In two seconds, three wave creproduced on the surface of the water.

P

X

Y

wave

crests

Which statement is true?

A Distance X is the amplitude of the waves.

B Distance Y is the wavelength of the waves.

C Each circle represents a wavefront.

D The frequency of the waves is 3Hz.


6/6

A B C D 8 A B C D

A B C D 7 A B C D

1 A B C D 5 A B C D

A B C D 6 A B C D

8

7

6

The drawing shows a wave.

Which labelled distance is the wavelength?

A

B

C

D

Water waves travel more slowly in shallow water than in deep water.

Which diagram shows what will happen to plane waves in deep water when they enter swater?

A

deep shallow

B

deep shallow

D

deep shallow

C

deep shallow

2

3

4

MCQ Answer Sheet

Dedicated to Mohammad Irtaza Haider Zain

physics test(unit 13 pdf

Documents