Multiple choice

The filament of electric bulb is made of

  1. nichrome

  2. tungsten

  3. iron

  4. none of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tungsten has an extremely high melting point (about 3422 degrees Celsius), which allows it to glow white-hot without melting when an electric current passes through it. This property makes it ideal for incandescent bulb filaments.