Unit 5 - Magnetism and electricity 2 Flashcards
a unit where energy is transferred by chemical reactions to electrical energy
battery
small negatively charged particle in an atom that orbits the nucleus
electron
flow of negatively charged electrons
electric current
a measure of the size of ‘push’ that causes a current to flow around a circuit
voltage
part of an electric circuit e.g. a light bulb
component
a material that transfers electrical charge by passing on energy to nearby particles
electrical conductor
does not allow a current to pass
electrical insulator
used to measure the current flowing in a circuit
ammeter
unit of measurement of current
ampere (A)
a measure of the size of ‘push’ that causes a current to flow around a circuit
voltage
a unit of measurement of voltage
volt (V)
a device used to measure the voltage across a component in a circuit
voltmeter
difference in charge across a cell or battery
potential difference
opposes the ‘push’ provided by the voltage in a circuit and is measured in ohms (Ω)
resistance (R)
negatively charged particles that move freely within a metal
free electron
the unit of measurement of electrical resistance (Ω)
ohm
a circuit component that opposes the ‘push’ provided by the voltage in a circuit
resistor
allows the amount of current flowing through a resistor to be changed
variable resistor
the thin length of wire in a light bulb
filament
a diagram or three dimensional object that makes an idea easier to understand
model
comparison between one thing and another
analogy
how the electricity supply in a house is connected
ring main
a device that uses electricity
appliance
household alternating-current electric power supply
mains supply
