1. Electric Current – Flow of electrons through a ___________. The number of _________ flowing through the conductor determines the amount of _________ ________. conductor electrons electriccurrent Two Types of Current Direct Current (DC) 1. _______________________________ 2.________________________________ 3.________________________________ 4. _______________________________ Current flows in the same direction. Flows from Negative to Positive. Batteries use (DC) Direct Current Bad because wires become hot (friction).

2. Alternating Current Alternating 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. DirectCurrent Electrochemical Cells Electrochemical Cell – Changes _________ energy into __________ energy. chemical electrical

3. TWO TYPES of Batteries Wet 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

4. Types of Batteries continued Dry Cell – most familiar 1 _______________________________. 2 ______________________________. 3______________________________. Example: ___________________________ Negative pole (zinc) Positive pole (carbon) Electrolyte (paste) C-batteries, D-batteries, 9-volts etc.

5. Electric Field Electric 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