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AP Physics Chapter 18 Electric Current

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AP Physics Chapter 18Electric Current

Alessandro Volta (1745-1827) invented the electric battery.

An electric cell is composed of 1 anode and 1 cathode…a battery is a battery of these cells.

An electrolyte is the solution in a cell.

The electrode is the metal of the electrode.

See electric cell and be able to build/sketch all parts.

- Current (I) is the rate of flow of electrons in a conductor.
- I= DQ/ Dt
- See circuit symbols…be able to translate/draw a symbol.
- See Example 18-1 p531.

- Simon Ohm (1787-1854) established experimentally that the current in a metal wire is proportional to voltage.
- Ohm’s law states V=IR or that current in a conductor is proportional to the voltage, in metal conductors. (See p533)
- Some materials are non-ohmic.
- See Example 18-3 p 533.

- PR#1-10 & 11-14