Three bulbs each having power P are connected in series in an electric circuit. In another circuit, another set of three bulbs of same power are connected in parallel to the same source. (i) Will the bulbs in both the circuits glow with the same brightness? Justify your answer. (ii) Now let one bulb in each circuit get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason
Answers
Answer:
Again, each bulb glows with the same brightness. However, the bulbs in Parallel Circuit glow with more brightness as compared to bulbs in Series Circuit. The reason is simply that Parallel Circuit Bulbs receive more Voltage.
Answer: (1) No the bulb in the two circuits will not glow with the same brightness. Because the resistance of the parallel circuit will be less than the series circuit, consequently electric current through the series circuit will be less than the parallel circuit.
(2) When one bulb gets fused in both the circuit, then in series combination, circuit gets broken and current stops flowing and remaining bulb don't glow. Whereas in parallel combination, same voltage continue to act on the remaining voltage and hence, other bulbs continue to glow with same brightness.