Meters in a Circuit Voltmeter – a device used to measure potential difference across a circuit. Connect outside the direct path of the current (parallel connection)

Meters in a Circuit Ammeter – a device used to measure the current through a circuit. Connect in the direct path of the current (series connection)

Meters in a Circuit Ohmmeter – a device used to measure the resistance of a circuit element Touch each test probe firmly to either end

Overload If a 1 appears by itself on the far left the multimeter has overloaded. Try going to a higher setting If at highest setting, record Overload or OL on lab

A Simple Circuit Model   What is the purpose of a battery? To store charges that will flow as current when properly inserted into a circuit. Also a battery creates a potential difference between each terminal.

A Water Analogy

What is a cell? A cell (wet or dry), releases energy due to a chemical reaction. A cell stores charges.

How is a battery different from a cell? A battery is just two or more cells wired together.

What is the difference between a D and AA cell? Both cells do 1.5 J of work for each Coulomb of charge moved from one side to the other However, a D cell stores more coulombs of charge, so it will last longer and do more work overall.

Two Types of Current

https://www.mi.mun.ca/users/cchaulk/eltk1100/ivse/ivse.htm

Drawing Circuit Schematic Diagrams Circuit Schematic – a diagram of an electric circuit using standard symbols for the circuit elements.

Steps for Drawing Schematic Diagrams Begin by drawing the symbol for the battery or other source of electric energy (such as a cell or generator).

Steps for Drawing Schematic Diagrams 2. Draw a wire coming out of the power source. Draw wires as straight lines (use a ruler if needed)

Steps for Drawing Schematic Diagrams When the path of the current reaches a resistor or other device, draw the appropriate symbol with values.

Steps for Drawing Schematic Diagrams 4. Follow the current path until you reach the other terminal of the battery.

Drawing Circuit Schematic Diagrams

3.0 Ω 1.5 V