|Name of Activity||Ohm’s Law and Series Circuits|
|Keywords||circuit, electricity, Ohm’s Law, voltage, resistance, current|
|Grade Level||4, 5, 6, 7, 8, 9+|
|Time||1 Hour Total|
|Brief Description||Students will build a simple circuit using previous knowledge about electricity. They will use Ohm’s Law to analyze the circuit.|
|Lesson Objectives:||– To introduce electricity, circuits, and electrical engineering.
– To apply Ohm’s law to real circuits.
|Materials Needed:||– 24 Gauge AWG wire, cut to 8 inch lengths w/stripped ends. Give each student group 5 – 6 8 inch pieces.
– 9V battery with connector plate.
– 2 1-Watt light bulbs with lamp bases.
– 2 Toggle switches.
– Alligator clip.
|Preparation and Set Up:||– Make a copy of the worksheet for each student.
– Prepare a demo circuit.
– Arrange students in groups of 2 – 3.
– Distribute materials.
|Necessary Background||Ohm’s Law describes the relationship between the voltage, current, and resistance of a circuit. This relationship is given in the relationship Voltage = Current x Resistance. Knowing this relationship, it is possible to find any of the three values as long as the other two are known.
|Extensions or Modifications:||Design on paper a circuit of your choice, using whatever size battery and resistors you want. Calculate the Voltage, Resistance and Current in your circuit. Your teacher will show you a circuit that she or she has built. Draw a circuit diagram representing it.|