Q. A $25\ watt,\ 220\ volt$ bulb and a $100\ watt,\ 220\ volt$ bulb are connected in series across a $220\ volt$ lines. Which electric bulb will glow more brightly
A) $25\ watt$ bulb
B) $100\ watt$ bulb
C) First $25\ watt$ and then $100\ watt$
D) Both with same brightness
Explanation
(a) The resistance of $25\ W$ bulb is greater than $100\ W$ bulb. So for the same current, heat produced will be more in $25\ W$ bulb. So it will glow more brightly
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.