What is the power of the lamp if its luminous efficiency is 2 lumen/watt and it

Question

What is the power of the lamp if its luminous efficiency is 2 lumen/watt and its luminous intensity is 42 candela?

Options:

A . 62 W

B . 78 W

C . 128 W

D . 264 W

Answer: Option D

Submit Your Solution Below and Earn Points !

Next Question

More Questions on This Topic :

Question 1. Which of the following has more luminous efficiency?....

Question 2. A point source of 100 candela is held 5 m above a sheet of blotting paper which reflects 75% of the incident light....

Question 3. A lamp hangs at a height of 4 m above a table....

Question 4. Lux is equivalent to which of the following?....

Question 5. Which of the following sources of light is the inverse square law valid for?....

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI

Tabulation - Test Paper 2 Data Interpretation Reasoning & DI

Test Paper 1 Direction Sense Test Reasoning & DI

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0

GFM Combined 1 Free Revision Test SAIL JO E-0