Review of the relationship between voltage, current, and resistance in a series or simple circuit... The effect on current of decreasing and increasing the resistance and/or the voltage...The effect on voltage of decreasing or increasing the resistance and/or current... Defining the action of current and voltage in a circuit, voltage being a "push" or force and current being the flow...

We continued with electric circuit problems involving the determination of current through resistors, total current in the circuit, and total resistance in the circuit. Schematic diagrams were used to show the circuits and indicate the positioning of ammeters and voltmeters when required. Using a few appliances plugged into the same circuit, giving their wattage and the voltage of the circuit, the total amperage is calculated and why all plugged in together to the same branch will cause an overload and an opening of the breaker was discussed.

A series of problems were solved which reinforced the areas of voltage, current and equivalent resistance which can be determined in a parallel circuit. The comparison to a series circuit was examined, and the answers to the problems discussed.

Defining electrostatics in terms of electric charge is static.
Define and explain why an object is electrically neutral, in terms of protons and electrons which are the fundamental particles of all atoms. Show that by rubbing a balloon on your hair, the balloon becomes negatively charged due to picking up electrons from the neutral hair. The hair has now become positively charged due to the loss of electrons. The opposite charges attract, the hair stands on end, or bits of tissue are attracted to a charged ruler or balloon for the same reason. Stress that only electrons are mobile, not protons. Relate the electric force to the force of gravity in terms of strength and direction.

4 preprinted problems regarding parallel circuits were presented. Each problem increased in difficulty, with the addition of increased factors to determine. They involved, in a series circuit, determining the total resistance (equivalent resistance), the total current, the voltage drops across each resistor and sketching the circuit using proper symbols. An introduction into parallel circuits was done using a schematic of a parallel circuit and determining the current through each line with the voltage remaining constant.

Introductory lesson on electrostatics... The relationship between charge and electric force, the structure of the atom and the movement of electrons only to create charge... The three common ways of producing a charged object; friction, touching, and induction...

The requirements of a circuit were shown by shared images, consisting of a closed system of an electromotive force, wires, and resistors (bulbs or other devices like a toaster). A series circuit was shown and defined. The characteristics of the circuit were described in terms of the current throughout, the voltage drop across each resistor, and the determination of the total resistance, amperage, and voltage using variations of Ohms law.

Placing an object at different distances from a convex lens focal point, the size, direction, and distance of the image was shown using a series of lens image diagrams. The laws governing the refraction of light through a convex lens were restated using the ray diagrams.

Review homework questions. Define and discuss electric power, the rate at which electrical energy is converted into other forms. Formula is power= current x voltage. The unit is the watt or Kilowatt. Series of problems to determine the power, current or voltage given 2 of the factors... Discussion of the kilowatt hour as the amount of energy consumed in 1 hr. Energy is also determined by the power x time. Solve a series of textbook questions from the end of the chapter.

The relationship between voltage, current and resistance was shown as Ohms law. The current in a circuit is directly proportional to the voltage and inversely proportional to the resistance was then shown as a formula. I = V/R. Questions dealing with the results of doubling the resistance or voltage and the effect on the current were answered. A few text question were solved using Ohms formula.