Review voltage. Discuss resistance in a circuit. Derive factors which will effect resistance in a circuit. Include wire thickness, length and temperature. Introduce the Ohm as the unit of measurement. Discuss and define Ohms law. Determine that the current is directly proportional to the voltage and inversely proportional to the resistance. Use symbols to explain the current, voltage, and resistance relationship. Introduce a few problems to be worked out.

Discuss and use examples to define that the net charge in a current wire is zero. Define that the net charge of zero depends on electrons moving out of the circuit due to an electron pump replacing them as they move out. The pump is a voltage source, a battery or generator. Discuss that the potential difference caused by a batteries terminals is due to the difference in electrical potential energy/coulomb. Discuss the voltage difference due to outlet terminals. Introduce resistance, define the term and determine what factors cause the flow of current.

Discuss net zero charge of a wire With current electricity. Use analogy of a tube filled with ping-pong balls and one more ball introduced into the tube. Compare the working of a water pump to a battery or generator. Discuss how the potential difference is the the voltage and the voltage source allows charges to move steadily. Discuss the voltage difference present in a wall outlet and how the voltage causes current

Set up a series of demonstrations which will be used for lab 91, current electricity. The procedures will include how to set up a series and parallel circuit. They will also demonstrate how each series will affect a number of resistances placed in the circuit. A schematic will be drawn for both series and parallel circuits.

Set up and follow the procedures for lab #91. This lab will allow the student to determine how to set up to demonstrate current electricity, series and parallel circuits. Discuss what each circuit entails, and demonstrate how to sketch a circuit diagram using the proper symbols

Compare current electricity to water flow, from high potential energy to low potential energy. Define electric potential in volts and the difference as voltage. Determine that to sustain the flow of charge, one end of the conductor must be kept at a higher potential energy than the other. Define electric current. Define current units as amperes, with one ampere being one 1 coulomb/sec. Indicate that a coulomb is 6.2 x 10^18 electrons. Indicate that there are no net changes as current passes through a wire

Compare current electricity to water flow. Discuss gravitational and electric potential enemy differences. Define that current flows from a high end of potential energy to a low end. Discuss current as a flow of electric charges carried by electrons. Define current units as amps and define the ampere. Show there is no net gain in electric charges when a current enters and leaves a wire.

Define electrical potential energy and relate it to gravitational potential energy. Discuss how electrical potential energy is created by the position of a charged particle within an electric field. Discuss how and what work is done. Introduce that the total electric potential energy per unit charge represents a volt. Volts are joules/coulomb. Discuss how a capacitor works to store electric PE. Discuss when capacitors are used within an electric circuit.

Review work and potential energy definitions. Review gravitational potential energy. Discuss that a charged particle can have a potential energy by virtue of its location in an electric field. Discuss how a charged particle placed in an electric field can have potential energy when work is done to move a charge within the field. Define electrical potential energy. Define the volt unit as joules/coulomb. Discuss how a capacitor works to store electrical energy and work with diagrams to best show how it works.

Discuss, review, and analyze the questions from Ben's homework assignment which needed to be answered. Introduce work and potential energy. Show that work involves a force moving a mass in the direction of the force. Define gravitational potential energy. Discuss electrical potential energy as work done to move a charged particle within an electric field. Discuss how the electrical PE is increased by increasing the work done to move the charge.