Illumination Solid angle is expressed in terms of degree. steredians. radians / meter. radians. degree. steredians. radians / meter. radians. ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to limit the flow of current. provide a kick start when voltage is induced. both ‘a’ and ‘b’. None of these. limit the flow of current. provide a kick start when voltage is induced. both ‘a’ and ‘b’. None of these. ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the ratio of illuminance at a point 5m just below a lamp emitting 100 candelas and at a point 5m away from the first point on the same horizontal plane? 2√2 : 1 1:2 1: 2√2 2:1 2√2 : 1 1:2 1: 2√2 2:1 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 45 %. 30 %. 20 %. 70 %. 45 %. 30 %. 20 %. 70 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination The range of visual spectrum is 480nm - 1000nm. 480nm - 760nm. 300nm - 760nm. 300nm - 1000nm. 480nm - 1000nm. 480nm - 760nm. 300nm - 760nm. 300nm - 1000nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficacy of a typical HPSV lamp is in between 70 - 120 lm/watt. 10 - 40 lm/watt 40 - 70 lm/watt. 120 - 200 lm/watt. 70 - 120 lm/watt. 10 - 40 lm/watt 40 - 70 lm/watt. 120 - 200 lm/watt. ANSWER DOWNLOAD EXAMIANS APP
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