Show:
Magnetism
Vocabulary
Circuits
Electricity and Charges
Electrical Currents
100
What is a magnet?
Any material that attracts iron or any materials containing iron.
100
What is a conductor?
A material or device that conducts or transmits heat, electricity, or sound.
100
What is a circuit?
A complete closed path through which electric charges flow.
100
What states that like charges repel and opposite charges attract?
The law of electric charges
100
When is an electric field created?
When a magnetic field gets stronger
200
Why do two magnets attract and repel?
It is because the magnets exert a magnetic force on each other.
200
What is an insulator?
A substance or device that does not readily conduct electricity.
200
How does a series circuit differ from a parallel circuit?
A series circuit is a circuit in which all parts are connected in a single loop, while parallel circuits have more than one path to travel.
200
How does charging by friction occur?
When electrons are "wiped" from one object to another
200
What does an electric current produce?
A magnetic field
300
What can demagnetize a magnet?
High temperatures
300
What is a solenoid?
A coil of wire with an electric current in it.
300
If there is a light bulb in a series circuit that burns out, what happens to the other bulbs?
None of the other light bulbs would light.
300
What two factors determine electrical force?
The amount of charge on each object and the distance between the charges
300
What unit is electric current expressed in?
Amperes, or amps
400
What can you make visible by sprinkling iron fillings around a magnet?
The magnetic field lines
400
What is resistance?
The opposition to the flow of electric charge.
400
What type of circuit is useful in wiring burglar alarms?
Series circuits
400
What is static electricity?
The electric charge at rest on an object
400
Electric current that changes direction is called what?
Alternating current
500
What are the magnets that have strong magnetic properties called? Give an example of a mineral that has such properties.
Ferromagnets / Magnetite
500
What is an electric generator?
A device that converts mechanical energy into electrical energy.
500
What three main components do all circuits need?
An energy source, wires, and a load
500
What is the loss of static electricity as charges move off an object called?
Static discharge
500
What is the type of electric current whose charges flow in the same direction? Give an example of the current being used.
Direct current and an example is the electric current from the batteries used in a camera.