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An ordinary light bulb has a rather short life because the
1. Filament wire is not uniform
2. Bulb cannot be evacuated completely
3. Wires supporting the filament melt at high temperature
Which of the above statements is/are correct?
1 and 3
2 and 3
1 and 2
1, 2 and 3
Third statement is incorrect. The wires supporting the filament melt at high temperature is not the valid reason for the ordinary light bulb's short life. It is merely a safety feature and does not impact the overall life of the bulb
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