Two Light Bulbs, B₁ and B₂, Are Connected to a Battery

question 42

Multiple Choice

Two light bulbs, B₁ and B₂, are connected to a battery having appreciable internal resistance as shown in the figure. What happens to the brightness of bulb B₁ when we close the switch S?

• A) The brightness of B₁ increases permanently.
• B) The brightness of B₁ decreases permanently.
• C) The brightness of B₁ does not change.
• D) The brightness of B₁ increases temporarily but gradually decreases back to its original brightness.
• E) The brightness of B¹ decreases temporarily but gradually increases back to its original brightness.

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Definitions:

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