McqsFactory McqsFactory.com is the devoted website for multiple choice questions answers in Pakistan. McqsFactory has been specially designed to cover this paper for various such examinations. The material of McqsFactory has been collected after going through different examination papers.
A. The tungsten filament evaporates and collects there
B. Glass undergoes a change due to the heat
C. The heat of the bulb scorches the glass at the top
D. Dust inside the bulb condenses on the top
Answer
A. The tungsten filament evaporates and collects there
Submitted by: Toheed Ahmed