Electricity and Magnetism Flashcards
What is resistance?
A material’s opposition to the flow of electric current. (Measured in Ohms)
What are conductors?
Materials that allow electrical energy to flow readily through them; inside of wires.
What is the Law of Electric Charges?
The law that states that like charges repel and opposite charges attract.
What is electric force?
The attraction or repulsion between electric charges.
What is conduction?
Energy is passed from atom to atom through direct contact.
What is an insulator?
A material that current cannot pass through easily.
What is static electricity?
A buildup of charges on an object.
What is a battery?
A source of stored chemical energy for electric currents, having a positive (+) and a negative (-) terminal.
What is voltage?
The difference in electrical potential energy between two places in a circuit. (Electrical pressure)
What is electrical current?
The amount of charge that travels past a fixed point in an electric circuit each second (Measured in amperes).
What is an ampere?
A unit of electric current, defined as the amount of charge flowing per unit of time.
What are ohms?
Units of electrical resistance.
What is a series circuit?
A circuit that contains only one path for current flow.
What is a parallel circuit?
A closed electrical circuit in which the current is divided into two or more paths and then returns via a common path to complete the circuit.
What is a magnet?
Any material that attracts iron and materials that contain iron.
What is a magnetic domain?
A region in which the magnetic fields of all atoms are lined up in the same direction.
What is a solenoid?
A coil of wire that produces a magnetic field when carrying an electric current.
What is a temporary magnet?
A magnet that does not keep its magnetism for a long time (e.g., magnetized iron nail).
What is a permanent magnet?
A magnet made from a material that keeps its magnetism for a long time.
What is magnetic induction?
Charging of an object due to a rearrangement of charges within the object; polarization.
