CHAPTER 1

ELECTRICITY

The amount of charge flowing past a point in a given time

CURRENT

The closed path for electrons to flow

CIRCUIT

The unit used to measure current

AMPS

A ________ _________ protects your home from circuit overloads Circuit breaker

List 3 ways to produce static electricity

FRICTION CONDUCTION INDUCTION

http://www.regentsprep.org/Regents/physics/phys03/aeleclab/default.htm

Like charges will _______ each other and opposites

will _____________

REPEL

ATTRACT

The electricity from the outlets is ______________ current and has a voltage of _____ ALTERNATING 120 VOLTS

The largest example of electric discharge

LIGHTNING!

_________ allow electrons to flow freely through

them.CONDUCTORS

Heating elements contain metals of ____________ resistance

HIGH!!

_________ can hold a static charge but do not allow the flow of electrons.

INSULATORS

Copper is used in electrical wiring because

It is a conductor with LOW resistance.

In this circuit, ________ energy is converted to electrical energy.

CHEMICAL

Increasing resistance will ___________ the current.

DECREASE

List 4 ways to reduce resistance in a conductor. Shorten the wire Use a good conductor Make the wire thicker Reduce the temperature of the wire

If voltage increases, what happenS to the current?

IT INCREASES!!

In the case of Lightning, _________ energy is

converted to heat, light and sound

ELECTRICAL

Electric power is measured in

WATTS OR KILOWATTS

Potential difference is measured in VOLTS

The source of potential difference in a circuit

BATTERY

If the voltage in a circuit is 20 and the resistance is 5, what is the current in amps?

4 amps

Why in a parallel circuit do the bulbs stay lit even if one goes out?

Each has its own path for electrons to flow

Describe the flow of energy through a circuit. Chemical reactions in electrolyte push

electrons out of the battery, through the conductor, to the load and back to the battery.

How does the VanDegraaf generator work??

Why can you make a balloon stick to a wall?