A circuit contains two light bulbs connected in parallel. What would happen to the brightness of each light bulb if two more light bulbs were added in parallel to the first ones?

In a parallel circuit connected to the same voltage source, each bulb gets the same voltage as before, so the brightness of each bulb remains the same. Adding more parallel branches lowers the circuit’s total resistance, but it does not reduce the voltage across the original bulbs. Therefore, the correct choice is “The brightness of each bulb would remain the same even though the total resistance of the circuit would decrease.”

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