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Home » Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source. (a) Will the bulb in the two circuits glow with the same brightness? Justify your answer. (b) Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.
Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source.
(a) Will the bulb in the two circuits glow with the same brightness? Justify your answer.
(b) Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.
CBSE | Class 10 | Electricity | NCERT Exemplar | Science
Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source.
(a) Will the bulb in the two circuits glow with the same brightness? Justify your answer.
(b) Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.

Answer:

a) In a series configuration, the resistance of the bulbs is three times greater than the resistance of a single bulb. As a result, when compared to the current in each bulb in the parallel combination, the current in the series combination will be one-third the amount. The parallel combination bulbs will have a brighter glow than the single combination bulbs.
b) Because the circuit has been broken and the current is zero, the bulbs in a series combination will cease to glow. But the bulbs that are connected in a parallel configuration must continue to glow at the same brightness.

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