Static Electricity
What is static electricity?
An imbalance of electric charge on the surface of an object
What is charging by friction?
Rubbing two objects to transfer electrons
What is a circuit?
A complete path that allows electrons to flow
What is electric current?
The rate of flow of electrons
What is electrical energy?
Energy from moving electrons
Which particles are transferred in static electricity?
Electrons
What happens in charging by conduction?
Electrons move through direct contact
What happens in an open circuit?
Electrons cannot flow
What unit is current measured in?
Amperes (A)
What is electrical power?
Rate at which energy is used
What happens when like charges come near each other?
They repel
What is grounding?
Removing excess charge by connecting to Earth
What is the difference between series and parallel circuits?
Series = one path, Parallel = multiple paths
What is voltage?
Energy per unit charge (potential difference)
What unit is power measured in?
Watts
Why does hair stand up when rubbed with a balloon?
Hairs gain the same charge and repel each other
What is charging by induction?
Charging without touching by shifting electrons
What happens to a series circuit if one load stops working?
The whole circuit stops
What is resistance?
Opposition to electron flow
What does efficiency measure?
Useful output vs total input energy
Why are neutral objects attracted to charged objects?
Electrons shift inside the neutral object (induced charge separation)
What is required to permanently charge an object by induction?
Grounding
Why are homes wired in parallel circuits?
So devices work independently
State Ohm’s Law
V= IR
Name two renewable ways to generate electricity
Wind, solar, hydro, geothermal, tidal