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A 1000 W bulb fitted with a reflector illuminates an area of 3 m x 3 m with an average illumination of 450 lux. If the bulb has and efficiency of 9 lumens / watt the efficiency of the reflector is
70%. 70%
30%. 30%.
20% 20%.
45%. 45%.
45%.
45%.
Practice and solve "A 1000 W bulb fitted with a reflector illuminates an area of 3 m x 3 m with an average illumination ..." for Electrical - Utilization Of Electrical Energy. The correct answer is Option D: 45%. 45%.. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(d) **