incandescent bulb
The filament glows when hot. This topic is part of Electricity within Technology. This page currently draws on 8 supporting questions, with answers and bonus facts available below.
incandescent bulb trivia questions
An incandescent bulb produces light by heating what?
Answer: Filament
Bonus fact: The filament glows when hot.
What metal is commonly used for an incandescent filament?
Answer: Tungsten
Bonus fact: Tungsten withstands very high temperatures.
Why are incandescent bulbs less energy-efficient than LEDs?
Answer: Much energy becomes heat
Bonus fact: Only a small fraction of their electrical energy becomes visible light.
What light source has largely replaced incandescent bulbs in modern flashlights?
Answer: LED
Bonus fact: LEDs are efficient, durable, and well suited to battery-powered lighting.
What part of an incandescent bulb glows when heated by current?
Answer: Filament
Bonus fact: Incandescent bulbs use a thin tungsten filament.
What metal is commonly used for incandescent bulb filaments?
Answer: Tungsten
Bonus fact: Tungsten has an extremely high melting point.
Compared with incandescent bulbs, LEDs usually use what?
Answer: Less electricity
Bonus fact: LEDs convert a larger share of electrical energy into light.
Which light source is generally more energy-efficient than an incandescent bulb?
Answer: LED
Bonus fact: LEDs turn more electrical energy into visible light.