Question

An ordinary tube light used for lighting purposes contains :

• A. fluorescent material and an inert gas
• B. one filament, reflective material and mercury vapour
• C. fluorescent material and mercury vapour
• D. two filaments, fluorescent material and mercury vapour

Answer 1

The correct option is D two filaments, fluorescent material and mercury vapour

An ordinary tube light used for lighting purposes contains:

1. Two filaments

2. Mercury vapours

3. Fluorescent material

Option D is correct.