Electric Current – Flow of electrons through a ___________. The number of _________ flowing through the conductor determines the amount of _________ ________.

conductor electrons

electric current

Two Types of CurrentDirect Current (DC) 1. _______________________________ 2.________________________________ 3.________________________________ 4. _______________________________

Current flows in the same direction.Flows from Negative to Positive.

Batteries use (DC) Direct CurrentBad because wires become hot (friction).

Alternating CurrentAlternating Current (AC)1.___________________________________2.___________________________________3.___________________________________

Current that changes direction at a regular rate.Most types of electricity (Power Plants).Wires produce less heat.

Battery – source of _______ _______. It is a series of ________________ connected together.

Direct CurrentElectrochemical Cells

Electrochemical Cell – Changes _________ energy into __________ energy.

chemicalelectrical

TWO TYPES of BatteriesWet Cell – simplest type of ______________.

THREE PARTS

1 ___________________________________

2 ___________________________________

3 ___________________________________

Example: ___________________________

electrochemical cell

Negative pole (zinc)

Positive pole (copper)Electrolyte (substance that conducts electricity; ex; sulfuric acid)

Car battery

Types of Batteries continuedDry Cell – most familiar

1 _______________________________.

2 ______________________________.

3______________________________.

Example: ___________________________

Negative pole (zinc)

Positive pole (carbon)

Electrolyte (paste)

C-batteries, D-batteries, 9-volts etc.

Electric FieldElectric Field – is like magnetism,

____________________________________

____________________________________

•___________________________________

Van de Graaff

1 ________________________________

2 ________________________________

A force field exists with electricity

Electric fields have both magnitude & direction

It’s a VECTOR quantity (number & direction)

Builds up a high voltage (house outlet 120v)

Produces between 3million and 20 million volts