Free Printable Electromagnetic Waves

1.

Electromagnetic waves...

a)

Needs matter to transfer energy.

b)

Do not need matter to transfer energy.

c)

Only needs matter sometimes

2.

Electromagnetic waves...

a)

Are made by vibrating electric charges and can travel through space.

b)

Are made by shining electric charges and can travel through space.

3.

Any moving electric charge is surrounded by an _________ and a magnetic field.

a)

electric light

b)

magnetic field

c)

electric field

4.

What happens when electric and magnetic fields change?

a)

A changing magnetic field creates the same electric field.

b)

A changing magnetic field creates a changing electric field.

c)

A changing magnetic field creates a burning fire field.

5.

Name one example of what transfers electric energy from one circuit to another circuit.

a)

generator

b)

voltmeter

c)

transformer

d)

hosepipe

6.

What is this?

a)

Sound Wave

b)

Radioactive Wave

c)

Electromagnetic Wave

d)

Magnetic Wave

7.

When an electric charge vibrates, the electric field around it changes creating a changing ________________ .

a)

magnetic field

b)

radio active field

c)

electron field

d)

sound field

8.

The magnetic and electric fields _________________________.

a)

create each other only once

b)

create each other again and again

9.

What is the speed of EM waves?

a)

3 km/s

b)

300,000 km/h

c)

300 km/s

d)

300,000 km/s

10.

EM waves usually travel slowest in solids and fastest in gases.

a)

True

b)

False

11.

An EM wave only travels in one directions.

a)

True

b)

False

12.

Wavelength = ...

a)

distance from crest to trough

b)

distance from crest to crest

c)

distance from start to finish

13.

Frequency = ...

a)

number of wavelengths that pass a given point in 10 s.

b)

number of wavelengths that pass a given point in 100 s.

c)

number of wavelengths that pass a given point in 1 s.

d)

number of wavelengths that pass a given point in 2 s.

14.

As frequency increases, wavelength becomes ____________.

a)

smaller

b)

higher

c)

wider

d)

longer

15.

Microwaves are _____________ with wavelengths less than 30 cm and higher frequency & shorter wavelength.

a)

computer sounds

b)

sound waves

c)

radio waves

d)

hand signals

16.

Cell phones and satellites use __________ between 1 cm & 20 cm for communication.

a)

microwaves

b)

car waves

17.

In microwave ovens, a _______________ causes water molecules to rotate billions of times per second causing friction, creating TE which heats the food.

a)

vibrating electric field

b)

vibrating magnetic field

18.

An antenna of a radio detects ___________.

a)

radio waves

b)

sound waves

c)

ocean waves

d)

mountain waves

19.

Radio waves are low frequency EM waves with wavelengths longer than _____.

a)

100 mm

b)

10 mm

c)

1 mm

d)

1 m

20.

Radio waves must be turned into _____________ by a radio before you can hear them.

a)

water waves

b)

light waves

c)

sound waves

21.

Which one does not belong?

a)

radio wave

b)

sound wave

c)

rope wave

d)

people wave

22.

Which one does not belong?

a)

X-Ray

b)

Sound wave

c)

Microwave

d)

Laser

23.

Which one does not belong?

a)

Earthquake

b)

Light waves

c)

Radio signal

d)

Radiation waves

24.

Which one does not belong?

a)

TV signal

b)

Ripple in water

c)

Sound wave

d)

Guitar string

25.

Antenna of a radio detects _______ ________

a)

micro waves

b)

TV waves

c)

radio waves

d)

directional waves

26.

Radio waves are _____ ________ EM waves

a)

high frequency

b)

low frequency

c)

low and high frequencies

d)

medium frequency

27.

Radio waves must be turned into ____ ___ by a radio before you can hear them.

a)

sound waves

b)

wind waves

c)

visable waves

28.

In microwave ovens, a vibrating electric field causes water molecules to rotate billions of times per second causing friction, creating TE which heats the food.

a)

False

b)

True

29.

Frequencies is called the electromagnetic spectrum

a)

True

b)

False

c)

Both

30.

Frequency = number of wavelengths that pass a given point in 1 km.

a)

False

b)

True

c)

Both

31.

As frequency increases, wavelength becomes bigger.

a)

True

b)

False

32.

Wavelength = v / f

a)

True

b)

False

33.

What is the speed of EM waves through diamond?

a)

124,000 m/h

b)

124,000 m/s

c)

124,000 km/s

d)

124,000 km/h

34.

EM waves usually travel slowest in solids and fastest in gases.

a)

True

b)

False

35.

EM waves usually travel slowest in gasses and fastest in solids.

a)

True

b)

False

36.

The wavelengths become shorter as the temperature of the material increases.

a)

False

b)

True

37.

All matter contains charged particles that are always moving.

a)

False

b)

True

38.

The electric and magnetic fields vibrate at right angles to the direction the wave travels so it is a transverse wave.

a)

True

b)

False

39.

An EM wave travels only in one directions.

a)

True

b)

False

40.

The magnetic and electric fields create each other again and again.

a)

True

b)

False

41.

When an electric charge vibrates, the electric field around never change.

a)

False

b)

True

42.

Electromagnetic waves are considered longitudinal waves

a)

True

b)

False

43.

Factors that affect a wave’s speed are ____________.

a)

Wavelength & Energy

b)

Frequency & Amplitude

c)

Wavelength & Frequency

d)

Amplitude & Tension

44.

The number of waves that pass by in a second is known as the wave's ______

a)

Wavelength

b)

Frequency

c)

Speed

d)

Amplitude

45.

1. The wave speed equation is v = frequency x wavelength. If the frequency of a wave is 500Hz and the wavelength is 2m, how fast is the wave moving?

a)

25 m/s

b)

250 m/s

c)

1000 m/s

d)

10,000 m/s

46.

1. Name the type of wave in which the medium particles vibrate in a direction perpendicular to the direction of wave motion.

a)

Longitudinal waves

b)

Electromagnetic waves

c)

Transverse waves

d)

Propagated waves

47.

A light wave is an electromagnetic wave which has both an electric and magnetic component associated with it. Electromagnetic waves are often distinguishable from mechanical waves. The distinction is based on the fact that electromagnetic waves ______

a)

come in a range of frequencies and mechanical waves exist with only certain frequencies.

b)

can travel through a region void of matter and mechanical waves cannot.

c)

cannot transport energy and mechanical waves can transport energy.

d)

can travel through materials and mechanical waves cannot.

48.

EMW are waves that do not need (a) to transfer energy

49.

The symbol for wavelengths is (a)

50.

Sound waves is an example of mechanical waves.

a)

True

b)

False

51.

Transverse waves move ________to motion of medium particles?

a)

Same direction

b)

Right angle

c)

Parallel

d)

None of these

52.

1. A wave has a wavelength of 1 m and a speed of 200 m/s. What is the frequency of the wave?

a)

20 m/s

b)

200 Hz

c)

200 m/s

d)

20 Hz

53.

The wave equation is ___________.

a)

v = f λ

b)

λ = v / f

c)

f = v / λ

d)

All of them

54.

The formula for time period of a wave is_________.

a)

T=1/v

b)

T= 1/c

c)

T= 1/f

d)

None of these

55.

The distance from one crest to another crest is called a___________.

a)

wave period

b)

wavelenght

c)

lambada

d)

None of these

56.

What is the velocity of a wave that has a frequency of 300 Hz and a wavelength of 2 m? (2)

(a)

57.

How does the speed of a wave change if the amplitude is increased?

(a)

58.

What is the formula of time period?

(a)

59.

Frequency refers to the number of ___________ ____________ of a wave that pass a given point in a specific amount of time.

Formula:

f = Number of Cycles / Time

Unit:
Hertz (Hz)

(a)

60.

Find the missing wave in the 7 examples of electromagnetic waves?

Radio waves, Microwaves, Infra red waves, Ultraviolet waves, X-rays, Gamma rays

(a)

Electromagnetic Waves

Total questions: 60

Worksheet time: 34mins

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