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Question
Fig. 9.12 shows three bulbs A, B and C each of rating 100 W, 220 V connected to the mains of 220 V. Answer the following:
(a) How is the bulb A connected with the mains? At what voltage does it glow?
(b) How are the bulbs B and C connected with the mains? At what voltage does the bulb B glow?
(c) How is the glow of bulbs A and C affected if bulb B gets fused?
(d) How is the glow of bulbs B and C affected if bulb A gets fused?
Fig. 9.12 shows three bulbs A, B and C each of rating 100 W, 220 V connected to the mains of 220 V. Answer the following:
(a) How is the bulb A connected with the mains? At what voltage does it glow?
(b) How are the bulbs B and C connected with the mains? At what voltage does the bulb B glow?
(c) How is the glow of bulbs A and C affected if bulb B gets fused?
(d) How is the glow of bulbs B and C affected if bulb A gets fused?
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Solution
(a) Bulb A is in parallel connection with the mains. It glows at 220 V
(b) Both bulbs B and C are in parallel connection with the mains. The bulb B glow at 110 V.
(c) Bulb C will not glow because bulb B is in series connection whereas the bulb A will glow.
(d) Bulb B and C both will glow.
(a) Bulb A is in parallel connection with the mains. It glows at 220 V
(b) Both bulbs B and C are in parallel connection with the mains. The bulb B glow at 110 V.
(c) Bulb C will not glow because bulb B is in series connection whereas the bulb A will glow.
(d) Bulb B and C both will glow.
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