Three identical light bulbs, A, B, and C, are connected in the circuit shown in

Question

Three identical light bulbs, A, B, and C, are connected in the circuit shown in the figure (Figure 1).

Part A When the switch S is closed, please explain which of the following answers is correct

a. When the switch S is closed, the brightness of A and B remains the same as it was, but C goes out.

b. the brightness of A and B remains the same as it was, but C will be about half as bright as it was.

c. the brightness of A and B decreases, and C goes out.

d. the brightness of A and B increases, and C will be about half as bright as it was.

e. the brightness of A and B increases, but C goes out.

Explanation / Answer

The current flows through a minimum resistance path. So when switch is closed the current flows throughthe switch so c will be off. And as c goes off the equvalent resistance becomes lesser so current increases thus the power increases so the brightness of a and b. Hence option (e) is correct.

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