3. In the circuit, the battery maintains a constant potential difference between its terminals, points 1 and 2 (i.e., the internal resistance of the battery is considered negligible). The three light bulbs, A, B, and C are identical. Assume that this is an idealized circuit (no internal resistance in the battery and resistance-free wires). a) [2Pt] How do the brightnesses of the three bulbs compare to each other? Explain your reasoning. b) [4Pt] What happens to the brightness of each of the bulbs when bulb A is unscrewed and removed from its socket? (answer with zero, goes up, goes down, or stays same) Brightness of Bulb A: Goes out Brightness of Bulb B: Brightness of Bulb C: c) [6Pt] With A unscrewed, what happens to the current through points 3, 4, and 5 compared to the brightness when all three bulbs are screwed in? (answer with zero, goes up, goes down, or stays same) Current through point 3: Current through point 4: Current through point 5:
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Since the bulbs are identical, they have the same resistance. Bulbs A and B are connected in parallel, and their combined resistance is half of the resistance of a single bulb. This parallel combination is connected in series with bulb C. Show more…
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Voltage in Simple DC Circuits and Ohm's Law In the circuit below, the battery maintains a constant potential difference between its terminals and the internal resistance of the battery is considered negligible. The three light bulbs, A, B, and C, are identical. How do the brightnesses of the three bulbs compare to each other? Explain your reasoning. What happens to the brightness of each of the three bulbs when bulb A is unscrewed and removed from its socket? Explain your reasoning. When bulb A is unscrewed, what happens to the current through points 3 and 5? Explain your reasoning. Bulb A is screwed back in. What happens to the brightness of each of the three bulbs when bulb C is unscrewed and removed from its socket? Explain your reasoning. When bulb C is unscrewed, what happens to the current flowing through points 3 and 5? Explain your reasoning. In the circuit below, a wire is connected from the battery terminal at point A to point B. For each of the questions, what happens to the brightness of each of the three bulbs? Explain your reasoning. What happens to the current flowing through points 3 and 5? Explain your reasoning.
In the circuit below, the battery maintains a constant potential difference between the terminals, points 1 and 2. The three light bulbs A, B, and C are identical. How do the brightnesses of the three bulbs compare to each other (circle one)? a) A is brightest, B is second brightest, C is dimmest b) A is brightest, B is dimmest, C is second brightest c) A is brightest, B and C are dimmer than A, but B and C are equal to each other in brightness d) A is dimmest, B is brightest and C is second brightest e) A is dimmest, B is second brightest and C is brightest f) A is dimmest, B and C are brighter than A, but B and C are equal to each other in brightness g) All three bulbs are equal in brightness
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