Q. Which has more luminous efficiency
A) A 40 $W$ bulb
B) A 40 $W$ fluorescent tube
C) Both have same
D) Cannot say
Explanation
The correct answer is Option B: A 40 $W$ fluorescent tube.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.