SSC RSMSSB JE Mock Test 2024 Utilization of Electrical Energy Illumination

प्रतिदीप्त लैंप की प्रदीपन दक्षता _______ है|

1
10 लुमेन/वाट
2
20 लुमेन/वाट
3
60 लुमेन/वाट
4
150 लुमेन/वाट
5
अनुत्तरित प्रश्न
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