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| Q.22 | Two electric lamps have filaments of the same metal having the same thickness. If one of them gives 100 watt and other gives 500 watt across the same supply, then: | |
| Ans | 1. 100 watt lamp filament has a shorter length | |
| 2. 100 watt lamp filament has longer a length | ||
| 3. 500 watt lamp filament has a longer length | ||
| 4. 100 watt and 500 watt lamp filaments have the same length |
Correct Ans: 2
