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science ch. 15
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flow of electrons or other charged particles from one place to another
current electricity
what is the SI for with the "force" with which an electric current flows
voltage
Formula to find power used when given voltage and current
P =VI
electricity that flows only in one direction
direct current (DC)
Electricity that continually alternates direction
alternating current (AC)
SI unit for measuring the amount of current
ampere
materials through which current flows easily
conductors
materials through which current does not easily flow
insulators
amount a certain object hinders electron flow
resistance
what unit is used to measure resistance quantity
ohm
a material that allows current to flow through it with
no resistance
at all
superconductor
an electrical device designed to add resistance to a circuit
resistor
what law states that current flowing through a conductor is directly proportional to the voltage and inversely proportional to the resistance
voltage = current x resistance
Ohm's law
V = IR
rate of charge flow
current
four factors affecting resistance of a conductor
the diameter of the conductor
temperature
length of the conductor
type of material
heat produced by electric friction
Joule heat
three parts of a simple electric circuit
source of current
conductors
load
a circuit that contains a complete path for a current to flow through
closed circuit
a circuit that contains a gap that the electrons cannot pass
open circuit
dangerous situation that occurs if electricity takes a "short cut" through the circuit
short circuit
narrow strip of metal housed in a protective, insulated case and protects against excessive current
fuse
what type of circuit has its load arranged so that the electric current flows through each load one after another
series circuit
circuit which has the loads arranged in separate branches so the current is divided among them
parallel circuit
what was the first type of electric light suitable for house hold use
incandescent lamp
what produces light by passing an electric current through a long tube filled with a low-pressure mixture of mercury vapor and argon
fluorescent lamp
a simple device that converts electricity to a back and forth motion
solenoid
device for communicating over long distance by means of electro magnets
telegraph
most important device for converting electricity into motion
electric motor
rotating electromagnet that aligns with the poles of the field magnet
armature
group of electrochemical cells connected together as a single source of current
battery
device that uses electromagnetic induction to produce electricity
generator
semiconductor that emits light when a direct electric current is applied
LED (light-emitting diode)
LED:
light-emitting diodes
an electrical switch operated by an electromagnet
relay
converts pulses of electricity into sound waves
loudspeaker
ability of magnetism to convert mechanical motion into electrical current
electromagnetic induction
device that increases or decreases the voltage of an alternating current using electromagnetic induction
transformer
three ways to increase strength of an electromagnetically induced current
speed of magnet
number of wire turns
strength of magnet
what generator uses a fluid as a moving conductor
magnetohydrodynamic
unit used by electric companies used to charge for electricity
Kilowatt-hour
name of the current for electric current that flows in both directions
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Author
Rayna
ID
329859
Card Set
science ch. 15
Description
A Beka
Updated
2017-04-06T00:20:26Z
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