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Consider the following statements. An ordinary light bulb has a rather short life because the1. Filament wire is not uniform.2. Bulb cannot be evacuated completely.3. Wires supporting the filament melt at high temperatures. Which of the above statements are correct?

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Consider the following statements. An ordinary light bulb has a rather short life because the<br />1. Filament wire is not uniform.<br />2. Bulb cannot be evacuated completely.<br />3. Wires supporting the filament melt at high temperatures. Which of the above statements are correct?






 
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