Multiple choice

The wire of flash bulb is made of

  1. copper

  2. barium

  3. magnesium

  4. silver

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

Magnesium wire burns with an intense white light when ignited, making it ideal for flash bulbs in photography. Magnesium has a low ignition point and produces a very bright flash, illuminating the scene briefly.