1. Explain and calculate the relationship of current, voltage, resistance and power in series and parallel circuits
2. Students should understand conductivity, resistivity and resistance, so they can relate current and voltage for a resistor.
3. Students should understand the behavior of series and parallel combinations of resistors, so they can:
4. Students should be able to apply Ohm’s Law and Kirchhoff’s rules to direct-current circuits, in order to determine a single unknown current, voltage, or resistance.
5. Students should understand the properties of voltmeters and ammeters, so they can identify or show correct methods of connecting meters into circuits in order to measure voltage or current.circuits in order to measure voltage or current.
Students will gain experience in a lab setting measuring voltage and current for a simple circuit consisting of a resistor and a battery. They will use the data to determine that a single resistor demonstrates Ohm’s Law nicely as they plot Voltage (volts) vs. Current (Amps) and find the slope equivalent to the measured resistance of the resistor. An internet-based activity will allow students to quickly construct several circuits and practice how to measure various quantities.
Length of time needed: 1 class period (60 min)
This lesson was written by Karin Foss.
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Source: Karin Foss