Which has more luminous efficiency? | Physics | SolveeIt | Solveeit

Today, August 18

Question

Which has more luminous efficiency?

A

A 40 W bulb

B

A 40 W fluorescent tube

C

Both have same

D

Cannot say

Answer

Cannot say

Explanation

Solution

A $40\, W$ fluorescent tube has greater luminous efficiency because for the same power supply, it gives more light.