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Physics: Two light bulbs of resistance R1 and R2 (> R1) are connected in series. Which is brighter?
Two light bulbs of resistance R1 and R2 (> R1) are connected in series.
Which is brighter? Justify your answer. If the bulbs are connected in a parallel circuit, which bulb is brighter? Justify your answer.
Will be quick to award BA, thanks in advance for any help
4 Answers
- 10 years agoFavorite Answer
R2 is brighter in series because the change in electric potential (voltage) is equal to current times resistance. Current remains constant so voltage is higher across R2 in series.
BUT when the resistors are in parallel the change in electric potential (voltage) is the SAME for BOTH RESISTORS so the bulbs will be equally bright.
Source(s): You should get some overalls :) they're really cute and have gotten kinda fashionable lately - great for fall - ?Lv 510 years ago
The one with the higher resistance. Power(is this case light) is equal to the current squared times the resistance. So the higher resistance one would produce the most light.