Consider the following statements: |
An ordinary light bulb has a rather short life because the: [IAS Prelim] |
1. filament wire is not uniform. |
2. bulb cannot be evacuated completely. |
3. wires supporting the filament melt at high temperatures. |
A) 1 and 3
B) 2 and 3
C) 1 and 2
D) 1, 2 and 3
Correct Answer: D
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