Chapter 13 SOLVING THE PARALLEL CIRCUITS
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15 Terms
What is a Parallel Circuit
A circuit in which all loads are connected across the two voltage source lines, allowing each load to act independently.
What are some characteristics of Parallel Circuits
In parallel circuits, each load has the same voltage across it, total current is the sum of individual currents, and the total resistance is less than the smallest load.
What is the total Current in Parallel Circuit?
The total current is divided among each load connected in parallel.
What is the Voltage across each load in a Parallel Circuit?
The voltage across each load connected in parallel is the same and equal to the voltage source.
Effect of Resistance on Current in Parallel Circuits
The current drawn by each load is inversely proportional to its resistance; higher resistance results in lower current.
Total Resistance in Parallel Circuit (2 loads)
RT = (R1 x R2) / (R1 + R2)
Total Resistance in Parallel Circuit (more than 2 loads)
RT = 1 / (1/R1 + 1/R2 + 1/R3 + ...)
Independent Loads
In a parallel circuit, each load operates independently of the others.
Ohm's Law in Parallel Circuits
Ohm’s law is applied to both the overall circuit and individual loads in parallel circuits.
Pathways for Current in Parallel Circuits
The number of pathways for current in a parallel circuit equals the number of loads connected.
Voltage Source
The source providing electrical energy to the parallel circuit, which applies the same voltage across all loads.
Current Division rule
Total current in a parallel circuit equals the sum of the currents through each load.
Decrease in Total Resistance in Parallel Circuits
Adding more loads in parallel decreases the total resistance due to multiple current paths.
Residual Current Impact
Higher resistance loads draw less current than lower resistance loads in parallel connections.
Circuit Analysis Method for Parallel Circuits
The procedure involves using circuit characteristics and equations similar to those used for series circuits.