UPSC 1999: Consider the following statement: An ordinary light bulb has a rather short life because the I. Filament wire is not uniform. II. Bulb cannot be evacuated completely. III. Wires supporting the filament melt at high temperatures. Which of the above statements are correct?

The correct answer is option (b): II and III. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.

This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 105. It falls under Science & Technology > Physics.

This question is rated "moderate". It requires sound conceptual understanding of the topic.

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