SUMMARY
Light bulbs typically blow when turned on due to the high current passing through the filament, which is a result of low resistance at lower temperatures. As the filament heats up, its resistance increases, but the initial surge of current can exceed the filament's capacity, leading to failure. The mechanical strain caused by thermal expansion also contributes to the filament's breakage. Understanding the relationship between resistance, temperature, and current is crucial in explaining this phenomenon.
PREREQUISITES
- Basic understanding of electrical resistance
- Knowledge of Ohm's Law
- Familiarity with the properties of metals and temperature effects
- Concept of thermal expansion in materials
NEXT STEPS
- Research the relationship between temperature and resistance in metals
- Study Ohm's Law and its applications in electrical circuits
- Explore the concept of thermal expansion and its effects on materials
- Investigate the design and materials used in light bulb filaments
USEFUL FOR
Students studying physics, electrical engineers, and anyone interested in the principles of electrical resistance and thermal dynamics in light bulbs.