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Quiz #15 - Magnetics and waves

Total questions: 155

Worksheet time: 2hrs 9mins

Name
Class
Date
1.

Magnetism is a force of ____________________________ that occurs between two _____________ objects.

a)

attraction or repulsion, magnetic

b)

external or internal, magnetic

c)

external or repulsion, electronic

d)

attraction or internal, electronic

2.

A magnetic field is a field of force that is produced by moving ________ charges.

a)

northern

b)

positive

c)

gravitational

d)

electric

3.

The magnetic ____________ around a bar magnet is shown above.

a)

legs

b)

flowers

c)

field

d)

direction

4.

The Earth produces its own ________ field.

a)

spectrum

b)

electric

c)

magnetic

d)

progressive

5.

A compass points toward the south pole of Earth's magnetic field, located near the Earth's geographical ________.

a)

north

b)

south

c)

east

d)

west

6.

In magnetic materials, all of the ________ are pointing in the same direction.

a)

doors

b)

electrons

c)

domains

d)

orbits

7.

A permanent magnet is a material that produces a ___________________ field without any ___________________ magnetic field being present.

a)

electronic, internal

b)

magnetic, internal

c)

magnetic, external

d)

electronic, external

8.

Permanent magnets can be demagnetized by ___________________ them past the Curie point (approximately 1,060 °F).  

a)

heating

b)

freezing

c)

shaking

d)

solidifying

9.

Every magnet has both a _________ pole and a __________ pole.

a)

North, South

b)

East, West

c)

Positive, Negative

d)

Positive, South

10.

Certain materials respond to magnetic fields by becoming ______________ themselves. ____________ is one of these materials.

a)

magnetic, Plastic

b)

electronic, Iron

c)

magnetic, Iron

d)

electronic, Plastic

11.

Some objects that normally aren't magnetic can become magnetized when connected to a circuit. Items that are magnetized in this way are called ________.

a)

electromagnets

b)

electrons

c)

electrochromic devices

d)

permanent magnets

12.

Probably the most useful thing about electromagnets is that they can be turned ________ and ________.

a)

on, off

b)

positive, negative

c)

north, south

d)

on, negative

13.

If two magnets are close together, the magnetic force will be ________.

a)

smelly

b)

weak

c)

strong

d)

positive

14.

If two magnets are placed so that a north pole and a south pole are facing each other, they will _____________ each other.

a)

date

b)

spin

c)

repel

d)

attract

15.

If two magnets are placed so that two ____________ poles or two ____________ poles are facing each other, they will repel each other.

a)

North, South

b)

external, internal

c)

positive, negative

d)

North, West

16.

Although magnetic fields are _____________, one common way that people investigate them is to use ________ filings.

a)

invisible, iron

b)

touchable, iron

c)

invisible, plastic

d)

touchable, plastic

17.

By sprinkling iron filings in a magnetic field on a flat surface, it is possible to see the __________ of a magnetic field.

a)

shape

b)

distance

c)

mass

d)

temperature

18.

The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.

a)

opposite

b)

like

c)

positive

d)

negative

19.

The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.

a)

like

b)

opposite

c)

positive

d)

negative

20.

A horseshoe magnet will generate a magnetic field similar in shape to that of two ________ poles brought near each other.

a)

like

b)

opposite

c)

positive

d)

negative

21.

Look at the picture carefully.

Which screws will be attracted?

a)

iron and steel screws

b)

iron and aluminum screws

c)

steel and aluminum screws

d)

all screws

22.

What would happen when two north poles of magnets are placed together?

a)

The force will pull them together (attract).

b)

The force will push them away from each other (repel).

c)

The strength of the magnet is doubled.

23.

What would happen when two north poles of magnets are placed together?

a)

The force will pull them together (attract).

b)

The force will push them away from each other (repel).

c)

The strength of the magnet is doubled.

24.

What would happen when the opposite poles of magnets are placed together?

a)

The force will pull them together (attract).

b)

The force will push them away from each other (repel).

c)

The strength of the magnet is doubled.

25.

True or False: All metals are attracted to magnet.

a)

True

b)

False

26.

Where is the force of attraction the strongest on a magnet?

a)

above the magnet

b)

below the magnet

c)

at the poles

d)

in the middle

27.

What do the lines around this magnet represent?

a)

North Pole

b)

South Pole

c)

Magnetic Declination

d)

Magnetic Field

28.

If you cut a magnet in half, what happens to the poles?

a)

One half gets the North Pole, the other half gets the South Pole.

b)

Both halves get only a South Pole.

c)

Both halves get only a North Pole.

d)

Both halves get a North pole and a South Pole.

29.

Which of the following objects will not be attracted to a magnet?

a)

fridge

b)

wooden bowl

c)

microwave

d)

cooking pot

30.

Look at the picture carefully.

The paper clips are . . .

a)

magnet

b)

magnetic objects

31.

How many poles does a magnet have?

a)

1 pole

b)

3 poles

c)

2 poles

d)

o pole

32.

like poles of a magnet attract each other and unlike poles of a magnet repel each other.

a)

true

b)

false

33.

usually the north pole of a compass needle is painted with

a)

Red

b)

blue

c)

black

d)

green

34.

Where is the strongest magnetic field around a bar magnet?

a)

above and below

b)

near the poles

c)

in the middle

d)

on the north pole

35.

A magnetic force becomes weaker as magnets ________.

a)

repel

b)

attract

c)

move together

d)

move apart

36.

Objects that are attracted to magnets are called...

a)

ferromagnetic

b)

magnet

c)

attraction

d)

repulsion

37.

To push away from a magnet

a)

repel

b)

attract

c)

levitate

d)

like

38.

A magnet created by running an electric current through it

a)

temporary magnet

b)

superconductor

c)

permanent magnet

d)

electromagnet

39.

Which of the following items is NOT attracted to a magnet?

a)

paper clip

b)

iron nail

c)

rubber band

40.

In order to magnetize an object for electromagnetism, it needs to have iron or steel (ex. a rod or nail).

a)

True

b)

False

41.

Electromagnets can be turned on and off.

a)

True

b)

False

42.

Electromagnets need a power source.

a)

True

b)

False

43.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
44.
Iron, Nickel and cobalt are all __________________ materials
a)
Shiny
b)
poles
c)
magnetic
d)
cold
45.
True or False: All metals are attracted to magnet.
a)
True
b)
False
46.

A device that uses a free-moving magnetic needle to show direction is a:

a)

Ruler

b)

magnet

c)

compass

d)

magnetic field

47.
Earth acts like a giant magnet because its center is made up MOSTLY of
a)
granite
b)
limestone
c)
iron
d)
nickel
48.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
49.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
50.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
51.
The magnet's shown will
a)
not move
b)
attract
c)
repel
d)
all of the above
52.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
53.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
54.
What is responsible for the Magnetic Field around Earth?
a)
The Earth's crust
b)
The Earth's molton iron core
c)
The Earth's mantel
d)
The Sun
55.
A refrigerator magnet is an example of a:
a)
magnetic material
b)
permanent magnet
c)
horseshoe magnet
d)
temporary magnet
56.

What are the 2 parts of a magnet?

a)

North Pole and South Pole

b)

North Pole and West Pole

c)

South and East Pole

d)

South and South Pole

57.

In which part of a magnet is the magnetic force strongest?

a)

In the Center

b)

At the Poles

c)

In the middle

d)

At the North Pole only

58.

What will happen when two like poles of magnets are put together?

a)

They attract each other

b)

They repel each other

59.

What will happen when two opposite poles of magnets are put together?

a)

They attract each other

b)

They repel each other

60.

Which is an example of magnetic object?

a)

Iron screw

b)

Copper wire

c)

Rubber toy

d)

newspaper

61.

How is magnet used in the picture?

a)

hold objects

b)

show direction

c)

produces movements

d)

lift heavy objects

62.

What is the use of the magnet in the picture?

a)

to produce sounds

b)

to show directions

c)

to store information

63.

When _______________ travels through a

conductor, a magnetic field is created

a)

current

b)

a magnetic field

c)

neutrons

64.

Electric currents produce _____________

a)

electron clouds

b)

magnetic fields

c)

sound waves

65.

In magnets and electromagnets, similar poles attract

a)

true

b)

false

66.

In magnets and electromagnets, dissimilar (opposite) poles attract

a)

true

b)

false

67.

Electrons which collect at the negative end of the battery, can flow to the positive end through a ___________________

a)

wire

b)

electron cloud

c)

magnet

68.

When the strength of the magnetic field changes, the ________________________between the coil and the permanent magnet changes.

a)

attractive force

b)

polarity

c)

wire

69.

Which of the following are important parts in allowing the speaker to function?

a)

A wire

b)

Speaker cone/membrane

c)

magnet

d)

Music player

e)

Spider

70.

Potential energy is stored within the magnetic field and is transferred to the magnets. When the magnets move, this is _________ energy.

a)

Magnetic

b)

Kinetic

c)

Plain ol' energy

d)

Force

71.

True or False: Taking air out from between two magnets takes away the magnetic field.

a)

True

b)

False

72.

What factors affect the strength of magnetic forces?

a)

Distance between the magnets

b)

Number of magnets

c)

Number of coils

d)

Strength of the current

73.

True or False: Electromagnets can be turned off.

a)

True

b)

False

74.

What direction does the magnetic force point?

a)

Out of north, into south

b)

Out of south, into north

c)

Out of north and south

d)

It has no direction

75.

Which part of the speaker system vibrates so that we can hear the sound?

a)

Wire

b)

Magnet

c)

Cone/Membrane

d)

Music Player

76.
What effect will the south pole of one magnet have on the south pole of another magnet?
a)
Repulsive
b)
Attractive
c)
Combative
d)
No effect
77.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
78.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
79.
Surrounding every magnet is a __________  __________.
a)
magnetic field
b)
electrical current
c)
another magnet
d)
an enemy
80.

The magnetic field stores _____________ ___________.

a)

potential energy

b)
electrical current
c)

iron filings

d)

kinetic energy

81.

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________.

a)

wire, iron

b)

electric, wire

c)

iron, electric

d)

excited, hair

82.
What are the ends of a magnet called?
a)
East and west poles
b)
Left and Right ends
c)
North and South ends
d)
North and South poles
83.
Any material that attracts iron or materials containing iron is a(n) 
a)
A. electric generator
b)
B. solenoid
c)
C. magnet
d)
D. magnetic force
84.
A compass needle responds to a magnetic field, because the compass needle is a
a)
A. generator.
b)
B. motor.   
c)
C. magnet.
d)
D. transformer.
85.
How do electromagnets differ from regular magnets? 
a)
A. They  can be turned off and on 
b)
B. Their polarity can be reversed
c)
C. Their strength can be changed
d)
D. All of the above
86.
Why are paper clips attracted to magnets?
a)
They contain silver.
b)
They contain aluminum
c)
They contain tin.
d)
They contain iron. 
87.

In magnets and electromagnets, similar poles attract

a)

true

b)

false

88.

In magnets and electromagnets, dissimilar (opposite) poles attract

a)

true

b)

false

89.
Bob made an electromagnet but it was very weak.  How can he make it stronger?
a)
take away a d-cell
b)
wrap the wire loosely
c)

add more batteries

d)
use less winds
90.

Refrigerator magnets and bar magnets are what type of magnet?

a)

electromagnet

b)

electronic

c)

permanent

91.

A force that can act at a distance is called

a)

non contact force

b)

friction

c)

balanced

92.

rhythmic disturbance that moves through a medium or vacuum

a)

wave

b)

wavelength

c)

seismic waves

d)

transverse waves

93.

The distance between two corresponding parts of a wave, such as from crest to crest

a)

wavelength

b)

amplitude

c)

compression

d)

rarefaction

94.

Lowest part of a wave

a)

trough

b)

crest

c)

amplitude

d)

wavelength

95.

Highest part of a wave

a)

crest

b)

trough

c)

wave

d)

amplitude

96.

the height of a wave from the origin to the crest

a)

amplitude

b)

wavelength

c)

compression

d)

rarefaction

97.

a denser, tightly packed region of a longitudinal wave

a)

compression

b)

rarefaction

c)

amplitude

d)

wavelength

98.

The less dense, more spread out region of a longitudinal wave

a)

rarefaction

b)

compression

c)

wavelength

d)

trough

99.

Waves of energy that provide us with the visible light spectrum (the colors we see)

a)

light waves

b)

sound waves

c)

seismic waves

d)

wave

100.

waves of energy that travel through the Earth and are the result of an earthquake, volcano, or explosion

a)

seismic waves

b)

light waves

c)

sound waves

d)

longitudinal waves

101.

waves of energy made by vibrations; require a medium (air, water, or solids) to travel

a)

sound waves

b)

seismic waves

c)

light waves

d)

transverse waves

102.

A wave that moves in a direction perpendicular to the displacement of the transmitting medium

a)

transverse wave

b)

longitudinal wave

c)

seismic wave

d)

light wave

103.

a wave that moves in the same direction as the displacement of the transmitting medium

a)

longitudinal wave

b)

transverse wave

c)

sound wave

d)

light wave

104.

What type of electromagnetic waves have the longest wavelength?

a)

Radio Waves

b)

Microwaves

c)

Visible Light

d)

X-Rays

105.

What type of electromagnetic waves have the shortest wavelength?

a)

Radio Waves

b)

Microwaves

c)

Visible Light

d)

Gamma Rays

106.

Which of these two electromagnetic waves has a shorter wavelength?

a)

Radio Waves

b)

Microwaves

107.

Which of these two electromagnetic waves has a shorter wavelength?

a)

Visible Light

b)

Infrared Light

108.

Which of these two electromagnetic waves has a shorter wavelength?

a)

X-Rays

b)

Ultraviolet Light

109.

Which of these two electromagnetic waves has a longer wavelength?

a)

Microwaves

b)

Ultraviolet Light

110.

Which of these two electromagnetic waves has a longer wavelength?

a)

Ultraviolet Light

b)

Gamma Rays

111.

Which of these two electromagnetic waves has a longer wavelength?

a)

Radiowaves

b)

Visible Light

112.

Which of these two electromagnetic waves has a higher frequency?

a)

Radio Waves

b)

Infrared

113.

Which of these two electromagnetic waves has a higher frequency?

a)

X-Rays

b)

Gamma Rays

114.

Which of these two electromagnetic waves has a higher frequency?

a)

Microwaves

b)

Visible Light

115.

Which of these two electromagnetic waves has a lower frequency?

a)

Radio Waves

b)

Visible Light

116.

Which of these two electromagnetic waves has a lower frequency?

a)

Visible Light

b)

X-Rays

117.

Which of these two electromagnetic waves has a lower frequency?

a)

Ultraviolet Light

b)

Gamma Rays

118.

Which of these two electromagnetic waves has higher energy?

a)

Gamma Rays

b)

X-Rays

119.

Which of these two electromagnetic waves has higher energy?

a)

Visible Light

b)

Microwaves

120.

Which of these two electromagnetic waves has higher energy?

a)

Infrared

b)

Radio Waves

121.

Which of these two electromagnetic waves has lower energy?

a)

Radio Waves

b)

Gamma Rays

122.

Which of these two electromagnetic waves has lower energy?

a)

Visible Light

b)

X-Rays

123.

Which of these two electromagnetic waves has lower energy?

a)

Microwaves

b)

Infrared

124.

______________________ are synchronized oscillations of electric and magnetic fields.


a)

Sound Waves

b)

Ocean Waves

c)

Electromagnetic Waves

d)

Compression Waves

125.

Electromagnetic waves are commonly referred to as?

a)

Light

b)

Sound

c)

Matter

d)

Space

126.
The blue section of the wave is measuring _________________.
a)
wavelength
b)
crest
c)
trough
d)
amplitude 
127.

What do all waves transfer?

a)

Matter

b)

Heat

c)

Electricity

d)

Energy

128.
What property of the wave is represented by the letter "B"?
a)
amplitude
b)
crest
c)
trough
d)
wavelength
129.

Six waves go past a fixed point in two seconds. What is the frequency of the wave?

a)

3

b)

6 Hz

c)

3 Hz

d)

2

130.

20 waves go past a fixed point in 10 seconds. What is the frequency of the wave?

a)

20 seconds

b)

20 Hz

c)

2 Hz

d)

2

131.
Which letter represents the wave crest?
a)
A
b)
B
c)
C
d)
D
132.
When a sound is louder what measurement gets bigger?
a)
Frequency 
b)
Amplitude 
c)
Wavelength 
d)
Crest
133.

If 120 waves are emitted in 1 minute, then the frequency of this source is?

a)

5 Hz

b)

6 Hz

c)

2 Hz

d)

4 Hz

134.
Sound is produced by
a)
music
b)
vibrations of molecules
c)
Electromagnetic Waves 
d)
Transverse Waves 
135.

The material through which a wave travels is?

a)

a rope

b)

water wave

c)

snaves

d)

medium

136.

Waves that require a medium are known as

a)

Medium waves

b)

Mechanical waves

c)

Air waves

d)

Heat waves

137.

What is a longitudinal wave?

a)

the matter through which a mechanical wave travels

b)

two lines that will never touch

c)

the particles of a medium that travel parallel to a wave

d)

two lines that meet at a right angle

138.

What is a transverse wave?

a)

the particles of a medium that travel perpendicular to a wave

b)

the particles of a medium that are fast

c)

the particles of a medium that travel parallel to a wave

d)

the particles of a medium that you can touch

139.

What type of wave is this?

a)

Transverse

b)

Longitudinal

c)

Surface

d)

Hair wave

140.

What type of wave is this?

a)

Transverse

b)

Longitudinal

c)

Surface

d)

Hair wave

141.

Which seismic waves travel through the interior layer of the Earth?

a)

body waves

b)

deep waves

c)

inner waves

d)

surface waves

142.

What do you call the motion or vibration of earthquake that travels outward from the focus?

a)

chemical energy

b)

electromagnetic waves

c)

gravity waves

d)

seismic waves

143.

Which set of waves are the S waves?

a)

Wave A

b)

Wave B

c)

Wave C

d)

They are all S waves

144.

Which set of waves are the P waves?

a)

Wave A

b)

Wave B

c)

Wave C

d)

They are all P waves

145.

P waves are also called

a)

pushing waves

b)

pulling waves

c)

primary waves

d)

primordial waves

146.
One end of the rope is vibrated to produce a wave with a wavelength of .25 m.  The Frequency of the wave is 3.0 Hz.  What is the speed of the wave?
a)
3.00 m/s
b)
2.50 m/s
c)
.75 m/s
d)
1.25 m/s
147.
How many waves are in this wave chain?
a)
6
b)
3
c)
4
d)
5
148.

If this wave chain represents 1 second, What is the frequency of the waves?

a)

1 Hz

b)

9 Hz

c)

3 Hz

d)

6 Hz

149.
 A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?
a)
500 m/s
b)
50 m/s
c)
5 m/s
d)
0.5 m/s
150.
 A wave has frequency of 5 Hz and a speed of 25 m/s. What is the wavelength of the wave?
a)
25 m
b)
125 m
c)
5 m
d)
25 m/s
151.
A wave has wavelength of 10 m and a speed of 340 m/s. What is the frequency of the wave?
a)
34 m/s
b)
3400 Hz
c)
3400 m/s
d)
34 Hz
152.
Which wave in the diagram has the greatest wavelength?
a)
1
b)
2
c)
3
d)
4
153.
Which wave in the diagram has the greatest frequency?
a)
1
b)
2
c)
3
d)
4
154.

A guitar string vibrates with a frequency of 320 hz. If the wavelength of the vibration is 0.23 meters what is the speed of the wave?

a)

320.23 m/s

b)

1391.3 hz

c)

73.6 m/hz

d)

73.6 m/s

155.

The blue-throated hummingbird flaps its wings 300 times a minute. What is its frequency?

a)

5 Hz

b)

300 Hz

c)

50 Hz

d)

2 Hz

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