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Parallel Combination in Circuits

Three bulbs P...

Question

Three bulbs P, Q and R are connected in a circuit as shown. At least one of the bulbs will glow if:

A

Only P is fused

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B

P and R, both are fused

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C

Only R is fused

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D

Q and R, both are fused

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Solution

The correct option is C Only R is fused

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Question 3

Three bulbs A, B, C are connected in a circuit as shown in Figure. When the switch is ‘ON’

(a) bulb C will glow first

(b) bulb B and C will glow simultaneously and bulb A will glow after some time

(c) all the bulbs A,B and C will glow at the same time

(d) the bulbs will glow in the order A, B and C

Q. Question 28 (iii)

B_{1}, B_{2}

B_{3}

are three identical bulbs connected as shown in Figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.
(iii) How much power is dissipated in the circuit when all the three bulbs glow together?

Q. In the given circuit, if bulb A is fused, then which of the given statements are correct when the switch is turned on?
I. Bulb B and bulb D are connected in series.
II. Bulb D and bulb E are connected in series.
III. No bulb will glow.
IV. Bulbs B, C, D, and E will glow whereas bulb A will not glow.

Q. Three incandescent bulbs of 100W 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 circuit gets fused. Will rest of the bulbs continue to glow in each circuit? Give reason.

Q. Three bulbs are rated as 20W 220V, 50W 220V & 100W 220V. i)If all the bulbs are connected in series then which one will glow more brightly. ii)If all the bulbs are connected in parallel then which one will glow more brightly?

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