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Magnetism Flashcards | StudBud
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Magnetism
Magnetism
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#grade9 #science #electricity #magnets
Flashcards
45 cards
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Questions
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Answers
1
Materials that are strongly attracted by magnets and can also be made into magnets.
ferromagnetic
diamagnetic
paramagnetic
ferrimagnetic
2
Which of the following is the most magnetic?
Gold
Aluminum
Nickel
Iron
3
What prevents most charged particles from the Sun from hitting Earth?
The aurora
High-altitude electric fields
Earth's magnetic field
Earth's atmosphere
4
Random trivia: Lemurs are native to what nation?
Malaysia
Morocco
Madagascar
Australia
5
TRUE or FALSE: A magnet can be used to create electricity.
False
True
6
Which of the following is a step-up transformer?
first coil - 8 wraps; second coil 7 wraps
first coil 6 wraps; second coil - 6 wraps
first coil - 7 wraps; second coil - 9 wraps
first coil - 9 wraps; second coil - 3 wraps
7
How many poles do all magnets have?
One
Three
Two
Four
8
When a current goes from one direction to the other, what is that called?
Differentiating current
Alternating current
Direct current
Permanent current
9
Materials that are slightly attracted by magnets.
diamagnetic
ferrimagnetic
paramagnetic
ferromagnetic
10
Which alloy makes the strongest magnets?
Neodymium
Cadmium
Polonium
Platinum
11
Regions where magnetic force exerted is the strongest are called what?
Cathodes
Magnetic Poles
Magnetic Fields
Anodes
12
Most of the electricity we use in our homes is supplied by a(n)
AC motor
AC generator
DC motor
DC generator
13
When you break a magnet in half, how many poles do the resulting magnets have?
One
Three
Two
Four
14
Heating a magnet will destroy its magnetism.
False
True
15
Which of these is not a way to make an electromagnet stronger?
None of the above
Increase the number of coils
Move the bar magnet faster
Increase the electrical current
16
How is an electromagnet different from a permanent magnet?
An electromagnet's poles cannot be reversed
An electromagnet attracts magnetic surfaces
An electromagnet has north and south poles
An electromagnet's magnetic field can be turned off and on
17
What does a generator do?
Increases voltage
Transforms kinetic energy into electrical energy
Transforms electrical energy into kinetic energy
Produces an alternating current
18
Input coil - 125 wraps; output coil - 75 wraps; input voltage - 125, output voltage is _____.
105 V
110 V
75 V
70 V
19
Where is the Earth's magnetic field generated?
Mantle
Surface
Crust
Core
20
When a current-carrying wire is wrapped around an iron core, what is produced?
An aurora
A generator
A magnet
A motor
21
Random Trivia: Where is a Shrimps Heart Located?
Its Feet
Its eye
Its Chest
Its Head
22
Which of these is a real-world example of an electromagnet?
MRI
Railgun
all the above
Maglev train
23
Coiled current carrying wire is called a
solenoid
transformer
electric coil
24
What do the lines in this picture represent?
Magnetic current
Electric current
Magnetic field
Electric field
25
Magnetism - South to South
Repel
Attract
26
_______ is the relationship between electricity and magnetism.
cobalt
Electromagnetism
metals
water
27
Which of the following is not a prime mover for a generator?
electricity
wind
gas/diesel
water
28
What domain creates magnetism, randomly oriented or uniform oriented?
Uniform
Random
29
Magnetism is stronger than gravity.
True
False
30
TRUE or FALSE: A compass points to geographic north, which is also magnetic north.
False
True
31
What make ups the Earth's magnetism?
the magnetic field generates nickel, carbon dioxide and oxygen
flowing of liquid metal in the outer core generates a magnetic field
the magnetic field generates nickel, copper and lead
flowing of electricity in the inner core generates a magnetic field
32
What kind of magnet is the Earth's magnetic field similar to?
Bar magnet
Horseshoe magnet
Disk magnet
Superconductor
33
What will the north poles of two bar magnets do when they are brought together?
Not interact
Repel
Attract
Create an electric current
34
Electricity is the movement of which charged particle?
Electrons
Neutrons
Atoms
Protons
35
Generators can produce only alternating current.
True
False
36
Lodestone is _________________.
a natural magnet
don't know
a heavy magnet
a load of stone
37
It is possible for a magnet to have only one pole.
False
True
38
Iron filings on paper can be used to show what?
Electric Field
None of the above
Gravitational Field
Magnetic Field
39
What is the device that turns motion into electricity by using a magnetic field?
Generator
Superconductor
Motor
Transformer
40
If 3 plums are worth 2 apples, how many apples are 24 plums worth?
8
48
12
16
41
TRUE or FALSE: An electric circuit must be closed for an electromagnet to be turned on.
False
True
42
Who discovered that a current carrying wire produces a magnetic field?
Magman
Gilbert
Oersted
Maricourt
43
Which of these is not a component of an electromagnet?
Solenoid
Source of electricity
Iron core
Lightbulb
44
Materials that are naturally magnetic.
Diamagnetic
Paramagnetic
Ferromagnetic
Ferrimagnetic
45
A specific area of a magnetic material that contains magnetic atoms is called what?
Field
Pole
Section
Domain
