Illumination What is the work of a driver in case of an LED? To convert AC to DC Both ‘a’ and ‘b’ To convert DC to AC None of these To convert AC to DC Both ‘a’ and ‘b’ To convert DC to AC None of these ANSWER DOWNLOAD EXAMIANS APP
Illumination Illumination can be expressed in lumens. lux. radians. candela. lumens. lux. radians. candela. ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the total flux emitted by a source of 60 candle power? None of these. 60 lumens. 0.001326 lumens. 754.2 lumens. None of these. 60 lumens. 0.001326 lumens. 754.2 lumens. ANSWER DOWNLOAD EXAMIANS APP
Illumination 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 20 %. 70 %. 30 %. 45 %. 20 %. 70 %. 30 %. 45 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination A 200 candle power lamp is hung 4 m above the centre of circular area of 5 m diameter. The illumination at centre of the area is 17.5 lux. 13.5 lux. 18.5 lux. 12.5 lux. 17.5 lux. 13.5 lux. 18.5 lux. 12.5 lux. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp is best suited for lighting an International sports arena? LED Incandescent Metal Halide Compact Fluorescent LED Incandescent Metal Halide Compact Fluorescent ANSWER DOWNLOAD EXAMIANS APP
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