Question

three incandescent bulbs of 100 W each
Vare connected in series in an electric
circuit. In another set of three bulbs of the
same wattage are connected in parallel to
the source
(i) Will the bulb in the two circuits glow
with the same brightness? Justify your
answer.
(ii) 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 1

Answer:

(a) Will the bulb in the two circuits glow with the same brightness? Justify your answer.

Ans. Voltage gets divided in series combination. So bulbs in series combination will glow with less brightness. Voltage does not get divided in parallel combination, so bulbs in parallel combination will glow with more brightness.

(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.

Ans. In case of series combination, fault in even a single component will break the circuit.

So, when one of the bulbs gets fused: another bulb would continue to glow.