The resistance of hot tungsten filament is about 10 times to that of cold tungsten filament. What will be the resistance of 100 W and 220 V lamp when not in use?
The resistance of the bulb filament is 100 Ω at a temperature of 100∘ C. If its temperature co-efficient of resistance be 0.005 per ∘ C, its resistance will become 200 Ω at a temperature
The winding of a motor has a resistance of 80 ohms at 150C. Find its resistance at 500 C. the temperature co-efficient of resistance is 0.004/0C