railway UPMRC SCTO 2024 Mock Test Utilization of Electrical Energy Illumination

A 200 V lamp has a total flux of 1000 lumens and takes a current of 0.5 A. Calculate its luminous efficiency?

1

5 lumens/watt

2

1 lumen/watt

3

10 lumens/watt

4

4 lumens/watt

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