Homework Activity Guide 22 2. Refer to the circuit shown to the right. In this \
ID: 1584357 • Letter: H
Question
Homework Activity Guide 22 2. Refer to the circuit shown to the right. In this "ideal" circuit, the battery has no internal resistance so that it maintains a constant potential difference between its terminals at points 1 and 2 regardless of how much current flows through it. Also, the three light bulbs, A, B, and C, are identical. (a) What happens to the brightness of each of the three bulbs if a wire is connected from the battery terminal at point 1 to point 4? 1 2 (b) What simultaneously happens to the current through point 3? c) What simultaneously happens to the potential difference across bulb B? (d) what simultaneously happens to the potential difference across bulb C? . (e) What simultaneously happens to the potential difference between points 1 and 5? Explain your reasoning.Explanation / Answer
(a) The wire provides a short circuit path, so bulbs A and B are ruled out and thus the equivalent resistance of the circuit decreases and thus current increases. So, the brightness of C increases while A and B are turned off.
(b) Decreases to zero.
(c) No current means, potential difference is zero.
(d) As current across C increases, so the potential difference(=IR) across it also increases.
(e) No current is there in this path, so potential difference is zero.
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