Question

In an electrical circuit three incandescent bulbs `A,B and C` of rating `40 W, 60 W and 100 W` respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness ?
A. Brightness if all the bulbs will be the same.
B. Brightness of bulb `A` will be the maximum.
C. Brightness of bulb `B` will be more than that of `A`.
D. Brightness of bulb `C` will be less than that of `B`.

Answer 1

Correct Answer - C
If bulbs of different wattages are joined in parallel, then the bulb with the highest wattage glows with maximum brightness. Thus, brightness of bulb `B(60 W)` is more than the brightness of bulb `A(40 W)`.