09 - S2 - Science - Electricity

electrostatic charge

charge that stays on an object

van de graaff generator definition

an instrument that can create electrostatic charges

conductor

a material that allows electric current to flow easily

insulator

a material through which current cannot flow easily

semiconductor

conducts electricity under certain circumstances

how objects become electrostaticly charged

by the creation of friction which causes a separation of charges

rule of attraction of electrostatic charges

Opposites attract

explain how a van de graaf generator works

it leaves the positive static charge on the sphere, when it is brought close to the van de graff, electrons jump across in an action similar to a lightning bolt

circuit

the pathway travelled by electrical current

current

number of electrons going around an electric circuit per second

ammeter

used to measure the current in a circuit

voltage

a measure of the amount of energy applied to a circuit

voltmeter

used to measure voltage

energy source

a main parts of a circuit, provides continuous charges

pathway

a main part of a circuit, charges flow along this

load

a main part of a circuit, converts electrical energy into other forms.

unit current is measured in

amps

unit voltage is measured in

volts

direction of current flow in a circuit