Magnets and magnetism
Which poles attract?
north and south
A coil that has a soft iron core and that acts as a magnet when an electric current is in the coil.
electromagnet
What object can be used to open or close a circuit
switch
Type of magnet that naturally contains iron, nickel, or cobalt
ferromagnet
If an atom gains electrons it has what charge?
negative
Groups of atoms in tiny groups that must line up to be magnetic
domain
List the 3 parts of an electromagnet
wire, battery, iron
Circuit with 1 path
series
The area around a magnet
Magnetic field
neutral
List the 3 magnetic metals
iron, nickel, cobalt
A coil of wire with an electric current in it.
solenoid
Circuit where the bulbs are brighter
parallel
Electrically charging an object without touching it
induction
Walking across carpet and then touching a doorknob is charging by what?
conduction
Why does a compass point to the north pole on Earth?
Attracted to earth's south magnet
List 2 ways to increase the strength of an electromagnet
more coils, bigger battery
Circuit where if 1 bulb goes out, the others go out
series
The path the electricity flows
Circuit
List 2 electrical current safety devices
fuse, circuit breaker
This is caused by charged particles from the sun hitting oxygen and nitrogen in our atmosphere causing glowing lights.
auroras
If you have an electric generator, and you wanted the lights to be dimmer, which of the following would you need to do?
(turn the coils faster, wrap the coils more, increase the magnet strength, move the magnets farther away)
Magnets farther away
How can you increase the brightness in a series circuit?
More electricity
Changes magnetism into electricity when electricity is normally unavailable
generator
The strength of an electric force depends on what 2 things
distance and charge size