direct current dc basic terms Flashcards
what is a unit of measurement used to express the flow of electrons.
ampere/amp/A
what is a device consisting of a number of primary voltiac cells (cells that cannot be recharged) or secondary cells (cells that can be charged) connected in series to obtain a DC voltage.
battery
what is an electrical component used to store electrical energy in the form of an electrostatic field
capacitor
what is a common building block of electrical circuits that easily permits the movement of electrons from a electrical source to a load and back to the electrical source with a minimum resistance.
conductor
what is a basic unit of electrical quantity
a coulomb
a coulomb is equal to 6.28 billion
what is the flow of electrons through a conductor
current flow
current
what is the flow of electrons in one direction throughout a circuit with constant voltage and current.
direct current
what is a negatively charged subatomic particles that are located and travel around (orbit) the nucleus in an imaginary sphere or shell at the speed of light (186,000 Miles/second).
ELECTRONS
what is the force that causes electrons to flow through a conductor. and what is its unit of measurement.
EMF (electro magnetic force)
measured in volts
what is the basic unit of a capacitance
a farad
what is the basic unit of measurement for inductance of a electrical coil
Henry (H)
what is a inductor
a inductor is a winding, or coiling of multiple turns of a wire
what is a material or device used to prevent the passage of heat, electricity, or sound from one medium to another
insulator
what is the left hand rule
this rule is for determining the direction of movement of a current-carrying conductor in a magnetic field
what is magnetic permeability
the measure of ease that lines of flux travel through a material
what is magnetism
it is the ability of a magnetic to attract certain materials containing iron to influence electrons.
what are metric prefixes
the measurements relating or using the metric system of measurement
what is a neutron
a neutral subatomic particles that exist within the nucleus of all atoms
what is a unit of electrical opposition to the flow of current
an ohm
what is ohms law
ohms law states that “the amount of current flowing in a circuit is directly proportional to the circuit voltage and inversely proportional to the circuit resistance.
what is a positively charged subatomic particles that exist within the nucleus of all atoms
protons
what is the electrical characteristic of a conductor
resistance
resistance is the force that opposes or slows down another force, drops voltage, and consumes power
what is a short way od expressing a given number as a number between 1 and 10 multiplied by 10 to the appropriate power
scientific notation
what is an electrical charge that may be built up on non-conductive surface by friction
static electricity
what is the basic unit of electrical pressure
volts
what is the basic unit of power that is the product of voltage multiplied by current
watts
what is the maximum amount of dc voltage that can be safely applied across a capacitor called
working voltage
