Fall 2017 Physics 227/232 ODU Name: D.P. Weygand November 7, 2017 2) The figure

Question

Fall 2017 Physics 227/232 ODU Name: D.P. Weygand November 7, 2017 2) 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? 2 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.

Explanation / Answer

The brightness increases permanently.

Here the resistors are in parallel,
So when switch closes the circuit resistance decreases.
So Current increases.

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