Electricity Flashcards
(20 cards)
Static Electricity
The accumulation of excess electric charge on an object.
Law of Conservation of Charge
Charge can be transferred from object to object, but it cannot be created or destroyed.
Conductor
A material in which electrons are able to move easily.
Insulator
A material in which electrons are not able to move easily.
Charging By Contact
The process of transferring charge by touching or rubbing.
Charging By Induction
The rearrangement of electrons on a neutral object caused by a nearby charged object.
Electric Current
The net movement of electric charges in a single direction.
Voltage Difference
Related to the force that causes electric charges to flow.
Circuit
A complete circular path that electricity flows through.
Resistance
The opposition that a substance offers to the flow of electric current.
Ohm’s Law
A law that states that the voltage across a resistor is directly proportional to the current flowing through the resistance.
Series Circuit
One in which all circuit elements are arranged in a single path.
Parallel Circuit
An electrical path that branches so that the current divides and only part of it flows through any branch.
Electric
A type of energy that consists of the movement of electrons between two points when there is a potential difference between them
Wet-Cell Battery
Enable high power outputs, and rapid discharge as the free flow of electrolytes facilitates high currents.
Dry-Cell Battery
A type of electric battery, commonly used for portable electrical devices. Unlike wet cell batteries, which have a liquid electrolyte.
Fuse
An electrical safety device having a metal wire or strip that melts and interrupts the circuit when the current becomes too strong.
Circuit Breaker
An electrical switch designed to protect an electrical circuit from damage caused by over current/overload or short circuit.
Amperes
The SI base unit of electrical current.
Watts
A measure of the rate of energy transfer over a unit of time
