Concept explainers
Why does the total circuit resistance decrease when more devices are added to a parallel circuit?
The reason for decreases in the total circuit resistance due to addition of more devices in a parallel.
Explanation of Solution
Introduction:
In a parallel connection, the voltage across each device remains same while the current varies.
In a parallel connection, there are more pathways to flow of current and the total current divides among the parallel branches. When more devices are added, the number of parallel branches increased and the total current increases. According to Ohm’s law, the current is inversely proportional to the resistance. So, the total resistance of the circuit decreases.
Conclusion:
The total circuit resistance decreases for parallel connection due to addition of more devices due to increase in the total circuit current.
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