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Question
Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line?
(a) 500°C
(b) 1500°C
(c) 2500°C
(d) 4500°C
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Solution
(c) 2500°C
It is the temperature of an electric bulb filament when it glows.
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