The Figure Shows Three Identical Lightbulbs Connected to a Battery

question 957

Multiple Choice

The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals.What happens to the brightness of lightbulb 1 when the switch S is closed?

• A) The brightness will increase momentarily then return to its previous level.
• B) The brightness increases permanently.
• C) The brightness will decrease momentarily then return to its previous level.
• D) The brightness remains the same as before the switch is closed.
• E) The brightness decreases permanently.

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