In the circuit below the light bulbs are identical and the battery is ideal. Ini

ID: 2290696 • Letter: I

Question

In the circuit below the light bulbs are identical and the battery is ideal. Initially, the capacitor is uncharged.

Please give a detailled essay-like answer to the last question, as it is worth 90% of the points. Thanks so much!

Which of the following statements best describes the behavior of Bulb A from just after the switch is closed until a long time later?

Bulb A is initially unlit and then increases in brightness to a steady level.

Bulb A is initially unlit and remains unlit.

Bulb A is initially lit and then decreases in brightness but does not go out.

Bulb A is initially lit and then decreases in brightness until it goes out.

Bulb A is always lit and its brightness stays the same.

Which of the following statements best describes the behavior of Bulb B from just after the switch is closed until a long time later?

Bulb B is initially unlit and then increases in brightness to a steady level.

Bulb B is initially unlit and remains unlit.

Bulb B is initially lit and then decreases in brightness but does not go out.

Bulb B is initially lit and then decreases in brightness until it goes out.

Bulb B is always lit and its brightness stays the same.

A long time after the switch is closed, how does the brightness of the two bulbs compare to each other?

Bulb B is brighter than bulb A.

Bulb B is dimmer than bulb A.

Both bulbs have the same brightness.

There is not enough information.

Explain your reasoning to answers chosen in the previous three questions.

Immediately after switch is closed ,capacitor acts as short circuit i,e as simple wire ,so A is the right answer

Bulb A is initially unlit and then increases in brightness to a steady level.

After long time ,capacitor acts as open circuit ,so C is the right answer

Bulb B is initially lit and then decreases in brightness but does not go out

since they have equal resistance ,after long time it acts as open circuit ,so

Both bulbs have the same brightness.

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