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20 questions
What is a major difference between electric charges and magnetic poles?
Electric charges can exist on their own.
Magnetic poles can exist on their own.
There are no differences.
What is a magnetic field?
A force field
a magnetic field does not exist
stationary electric charge
What is the source of a magnetic field?
Moving electric charge
Stationary Electric Charge
There is no source.
A north pole of the magnet is brought near a south pole
they will repel
they will attract
so? nothing will happen
In order to make an electromagnet, you need
a magnet, a nail, some wires
a battery, a nail, and a magnet
a battery, a coil of wire, and a nail
a loop of wire, contacts, and a battery
How can you destroy a magnet? Choose all that apply.
Drop It
Heat It
Cover it with paper
You can't destroy it
if you break a bar magnet in half
the poles will seperate
You will have two complete magnets
it becomes unmagnetized
Which pole of the compass needed points to a south pole of a magnet?
South pole
North Pole
Both poles
magnetic fields run from _________ pole to ___________ pole
North, South
South, North
They do not exist
What makes electromagnets different from regular magnets?
they can be switched off and on
they use less energy
they are more user-friendly
they do not pollute the environment
What is the device shown?
Solenoid
Electromagnet
Generator
Motor
What happens when a compass is moved near a strong magnet?
it points north
it points toward the magnet
it spins in circles
it doesn't move
The Right Hand Rule says that if you hold a wire in your right hand and point your thumb in the direction of the ______ current, the direction that your fingers curl is the direction of the _______.
Positive, Magnetic Field
Positive, Current
Negative, Magnetic Field
Negative, Current
___, ____, and ____ are magnetic metals.
Iron, Nickel, Cobalt
Copper, Chromium, Gadolinium
Aluminum, Iron, Copper
Cobalt, Mercury, Sodium
What is the device shown?
Electromagnet
Solenoid
Generator
Motor
Which kind of circuit only has one path for electricity to flow?
Series
Parallel
Series and Parallel
If a bulb is not working in a series circuit, what happens to the other bulbs?
none will work
the rest will work
If a bulb is not working in a parallel circuit, what happens to the other bulbs?
none will work
the rest will work
When a current flows through a wire, it creates a _______ around the wire.
magnetic field
magnetic pole
compass
attraction
Which three materials would allow you to build an electromagnet?
Battery, Wire, Nail
Battery, Tape, Paper
Wire, Nail, Paper Clip
Sandpaper, Tape, Wire
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