Optics Question 485

Question: If the luminous intensity of a 100 W unidirectional bulb is 100 candela, then total luminous flux emitted from the bulb is

[AIIMS 1998]

Options:

A) 861 lumen

B) 986 lumen

C) 1256 lumen

D) 1561 lumen

Show Answer

Answer:

Correct Answer: C

Solution:

$ \varphi =4\pi L $

$ =4\times 3.14\times 100 $ = 1256 lumen.



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक