engineering recuitment MPPKVVCL Line Attendant Mock Test 2025 Utilization of Electrical Energy Lamps and Bulbs

तापदीप्त लैंप की दक्षता निम्न क्रम की होती है

1
70 lm/W
2
60 lm/W
3
40 lm/W
4
10 lm/W
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