NCCR 26103-23 Flashcards
What is a battery?
A DC voltage source consisting of two or more cells that convert chemical energy into electrical energy.
What is a circuit?
A complete path for current flow
What is an atom?
The smallest particle to which an element may be divided and still retain the properties of that elementW
What is a proton?
The smallest positively charged particle of an atom. Protons are contained in the nucleus of the atom.
What is a charge?
A quantity of electricity that is either positive or negative
What is an electron?
A negatively charged particle that orbits the nucleus of the atom
What is the neutron?
An electrically neutral particle that has the mass of a proton and is found in the nucleus of an atom.
What is a nucleus?
The center of an atom. It contains the protons and neutrons of the atom.
What is a valence shell?
The outermost ring of electrons that orbit the nucleus of an atom
What is an ion?
An atom with a negative or positive charge due to gaining or losing electrons
What is a conductor?
A material through which it is relatively easy to maintain an electric current
What is a insulator?
A material through which it is difficult to conduct an electric current
What is a semiconductor?
A material that has electrical properties between that of a conductor and an insulator
What is a voltage?
The driving force that makes current flow in a circuit
What is a current?
The movement of electrons in a circuit
What is a resistance?
An electrical property that opposes the flow of current through a circuit.
What is power?
The rate of doing work, or the rate at which energy is used or dissipated
What is a volt?
The unit of measurement for voltage. One volt is the electromotive force needed to push one ampere of current through a resistance of one ohm.
What is a coulomb?
A unit of electrical charge equal to 6.24 x 10^18 electrons
What is a joule?
A unit of energy measurement of doing work. One joule is equal to one newton-meter.
What is a ampere?
The basic unit of measurement for electrical current
What is an ohm?
The basic unit of measurement for resistance
What factors affect current?
Applied voltage.
Wire size
Conductor material
Temperature
Conductor length
What factors affect resistance?
Conductor length
Wire size
Conductor material
