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Concepts:
A parallel circuit has multiple loops. In a parallel circuit, the voltage is constant, the current is additive, and the inverse of the total resistance equals the sum of the inverses of the individual resistances.
Summary:
Students collect voltage and current data across the elements of two parallel circuits to determine their basic properties.
Objectives Links:
III. C. Electric circuits
Process Skills Checklist
Equipment:
- hookup wire
- 3 high-power resistors varying sizes (5, 10, 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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