Electricity
The process of diverting unwanted electric charge directly into the earth.
What is grounding?
This moves when charge flows through an electrolyte.
What are ions?
A circuit that contains a complete path for electrons to flow through.
What is a closed circuit?
The imaginary line that circles Earth halfway between the two magnetic poles.
What is the magnetic equator?
This method of magnetism is used when a needle is magnetized by holding a magnet near a needle.
What is magnetizing by induction?
An object with an equal number of positive and negative charges.
What is neutral?
The SI unit of current
What is an ampere?
A device that opens or closes a circuit.
What is a switch?
The region of concentrated magnetism at the end of a magnet.
What is a pole?
A substance that has no unpaired electrons and is slightly repelled by either pole of a magnet.
What is a diamagnetic substance?
The law that relates current, voltage, and resistance.
What is Ohm's Law?
The rate of electric charge flow.
What is current?
An electrical device designed to hinder current flow.
What is a resistor?
These are used to indicate the direction and strength of a magnetic field.
What are lines of flux?
This substance has several unpaired electrons per atom and is strongly attracted to magnets.
What is a ferromagnetic substance?
The SI unit of resistance.
What is an Ohm?
Material through which current does not easily flow.
What is an insulator?
This circuit-protection device uses a narrow strip of metal to prevent excessive current through a circuit.
What is a fuse?
Earth's "north-seeking" pole.
What is the south magnetic pole?
The force that causes an electric charge moving through a magnetic field to deviate from its original path.
What is a deflecting force?
This kind of electric field has an equal strength throughout.
What is a uniform field?
Material through which current flows easily.
What is a conductor?
A simple device that uses the laws of electrostatics to detect small electric charges.
What is an electroscope?
A material whose domains strongly resist changes in the direction of its magnetic field is referred to as this.
What is magnetically hard?
The extent to which a material can absorb or channel lines of flux.
What is permeability?
This process imparts electric charge at a distance without direct contact between objects.
What is induction?
Material that allows current to flow through it with no resistance.
What is a superconductor?
This device transforms the energy of an electric current into another useful form of energy.
What is a load?
The extent of a planet's magnetic field in space.
What is the magnetosphere?
The resistance of a magnet to being demagnetized by another magnetic field.
What is coercivity?
This value equals the product of voltage and current in an electric current.
What is power?
The most important factor affecting the ease of current flow through a wire.
What is material?
The work per unit charge done to move electric charges between different parts of an electric field.
What is voltage?
The two belts of charged particles located above Earth's equator that protected Earth from the solar wind.
What are the Van Allen radiation belts?