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Concepts:
A resistor is a device especially designed for a certain amount of resistance and is coded using colored bands. A series circuit has one loop. In a series circuit, the voltage is additive, the current is constant, and the total resistance equals the sum of the individual resistances.
Summary:
Students test color-coded resistors by collecting current and voltage data. They then collect similar data across the elements of a series circuit to determine its basic properties.
Objectives Links:
III. C. Electric circuits
Process Skills Checklist
Equipment:
- hookup wire
- 3 high-power color-coded resistors of varying sizes (5, 10, and 20 ohms)
- ammeter
- voltmeter
- 12 V variable power supply
Safety Concerns:
Because low voltages are being used, risk of dangerous electric shock is minimal. Meter hookup should be monitored to avoid equipment damage. Also, resistors should be checked for overheating.
Revision Date:
December 2003
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