Which of the following materials is most commonly used for the filaments in incandescent lamps?

• The material most commonly used for filaments in incandescent lamps is tungsten.
• Tungsten is preferred because it has a very high melting point (around 3,422°C), which allows it to operate at the high temperatures necessary to emit visible light without melting.
• It also has good electrical conductivity and durability, making it ideal for long-lasting performance in incandescent bulbs.
  
  Additional Information 

Tungsten is preferred for filaments in incandescent lamps due to several key properties:

1. High Melting Point: Tungsten has an extremely high melting point of around 3,422°C, which allows the filament to glow at high temperatures without melting, ensuring durability and efficiency in light production.
2. High Electrical Resistance: Tungsten's electrical resistance allows it to convert electrical energy into heat and light efficiently when a current passes through it.
3. Durability: Tungsten is a very strong and durable metal that can withstand repeated heating and cooling cycles, increasing the lifespan of the filament.
4. Low Evaporation Rate: Even at high temperatures, tungsten has a low evaporation rate, reducing the thinning of the filament and prolonging its life.