Physical science

Electric energy

Static electricity

is the accumulation of excess electric charge on an object

Law of conservation of charge

states that charge can transferred from object to object,but it cannot be created or destroyed

Charging by contact

is the process of transferring charge by touching or rubbing

Charging by induction

When nearby charged object causes the rearrangement of electrons on a neutral object

electroscope

is a device that can detect electric charge

Electric current

is the net movement of electric charges in a single direction

Voltage difference

is related to the force that causes electric charges to flow

Electric circuit

is a closed path that electric current flows

Resistance

is the tendency for material to resist the flow of electrons and convert electrical energy into some other forms,such as thermal energy

Ohm’s law

the current in a circuit equals the voltage difference divided by the resistance.

Series circuit

is an electric circuit with only one branch

Parallel circuits

contains two or more branches for current

Electrical power

is at the rate at which electrical energy is converted to another form of engery