Illumination The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is 3 / 2. 2 / 3. 1 / 3. 2 / 5. 3 / 2. 2 / 3. 1 / 3. 2 / 5. ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficiency of a fluorescence lamp is 70 lumens / watt. 30 lumens / watt. 60 lumens / watt. 40 lumens / watt. 70 lumens / watt. 30 lumens / watt. 60 lumens / watt. 40 lumens / watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminance Illuminance Luminous Intensity Luminous flux Luminance Illuminance Luminous Intensity Luminous flux ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamps can be directly connected to a solar cell? Incandescent Compact Fluorescent Metal Halide LED Incandescent Compact Fluorescent Metal Halide LED ANSWER DOWNLOAD EXAMIANS APP
Illumination The illumination of the surface varies directly with cosine of the angle between normal to surface and direction of the inclined light is given by None of these Lambert’s cosine law. both A and B. law of square inverse. None of these Lambert’s cosine law. both A and B. law of square inverse. ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficacy of a typical HPSV lamp is in between 10 - 40 lm/watt 70 - 120 lm/watt. 40 - 70 lm/watt. 120 - 200 lm/watt. 10 - 40 lm/watt 70 - 120 lm/watt. 40 - 70 lm/watt. 120 - 200 lm/watt. ANSWER DOWNLOAD EXAMIANS APP
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