Concept explainers
A number of lightbulbs are to be connected to a battery. Which will provide more overall brightness, connecting them in series or in parallel? Which will run the battery down faster, the bulbs connected in series or the bulbs connected in parallel?
The type of connection for more brightness and for faster draining of battery.
Explanation of Solution
Introduction:
The brightness of the lightbulb depends on the current through the lightbulb. The current in the series circuit remains less than the parallel circuit. Lesser is the current slower is the flow of electron in the circuit.
The equivalent resistance for the lightbulb in the series circuit remains always greater than the equivalent resistance for the lightbulb in a parallel circuit. So, less current passes through the series connection than in the parallel connection. The current through each lightbulb in parallel connection is more than the series connection. So, the lightbulb connected in parallel provides the overall greater brightness.
The discharging of the battery is faster for the less current. The current in the parallel connection is more than the series connection, so the battery drains faster due to the parallel connections of the light bulbs.
Conclusion:
The brightness is more for parallel connection of light bulbs and the battery also drains faster for parallel connection of light bulbs.
Chapter 35 Solutions
Conceptual Physics: The High School Physics Program
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