Discuss and review the major aspects of a magnetic field. Discuss strength, attraction, magnetic force, and force direction. Analyze a force v distance graph. Discuss magnetic domains and how they create a magnetic field. Differentiate permanent magnets from temporary magnets
Outline and review the concepts which explain magnetic fields.
Diagram magnetic domains and explain how they create a magnetic field in specific metals like iron and nickel.
Discuss how to form a temporary magnet using a permanent magnet.
Build a model which illustrates electrical current. Determine any visible evidence that something is moving around the circuit. Place a magnetic compass under the circuit. Observe what happens to the needle when the circuit is opened and closed. Move the compass position and observe the needle movement. Reverse the leads and observe any change. Change the voltage in the circuit and observe any change. Construct an electromagnet using various numbers of coils. Observe changes
Build and analyze a model that illustrates an electric current. The procedure involves a series set up using bulbs as the resistors. A compass magnet is used to observe the magnetic field produced by a moving current. Direction of the the Current and deflection by the magnet are observed and noted. Changes in the deflection due to increases in voltage are recorded. Analysis involves hypothesizing what is happening in the current, what is occurring when the direction of current is changed, what is occurring when the voltage changes.
Describe parallel circuitry using a schematic. Indicate that the pathway's for current run parallel to each other. Discuss that each device operates independently of the other devices . Determine the current passing through a set of resistors with a given Ohm resistance. Discuss that the total current is the sum of all the current passing through each appliance. Work the formula l/Rt= 1/R1 + 1/R2+1/R3....... Sketch a schematic for 3 resistors in a circuit with 2 in parallel and one in series. Determine the current for the circuit if the voltage is given. Discuss parallel circuits and overload
Outline both series and parallel circuits, use schematics. Discuss the characteristics of both circuits, current pathways, how to determine total resistance, and how to determine current through each resistance, and how to determine voltage through each system. Discuss parallel circuits and overload, and how to determine maximum load for a circuit.
Review using hands on program the procedures and formulas needed to determine the pathways of electric current through a variety of circuits. The results are determined after each question use. The formula for power and energy through an electric circuit is used to determine the current and voltage through different circuits
View and discuss video which concentrates on the determination of voltage, resistance, current, and power through both series and parallel circuits. The math required to determine each of the factors is analyzed and the results compared. The differences in resistance, current, power and voltage is shown for each circuit type
View video which includes both series and parallel circuit setups. Each one will involve determination of current, resistance and power at the battery source and through each resistance. Show how to determine the total resistance in series and parallel circuits, and determine the power through each resistance.
lab exercises which demonstrate Ohm's law. How are voltage, current, and resistance related to one another. Exercise involves measurements of voltage and current using bulb resistors of varying resistance. Measurement are conducted by varying the voltage passing through a number of bulbs in series and measuring the current. Resistance is determined by using Ohm's law, and compared to each set of resisors
