railway RRB JE (CBT I + CBT II) Mock Test 2024 Utilization of Electrical Energy Illumination

A 250 V lamp has a total flux of 1500 lumens and takes a current of 0.4 A.

Calculate:

(1) Lumen per watt

(2) M.S.C.P. per watt

1
15, 1.4
2
15, 1.2
3
16, 1.2
4
16, 1.4
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