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. 18.5 lux. 13.5 lux. 12.5 lux. 17.5 lux. 18.5 lux. 13.5 lux. 12.5 lux. ANSWER DOWNLOAD EXAMIANS APP
Illumination The range of visual spectrum is 300nm - 760nm. 480nm - 1000nm. 300nm - 1000nm. 480nm - 760nm. 300nm - 760nm. 480nm - 1000nm. 300nm - 1000nm. 480nm - 760nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is 30 150. 200. 140. 30 150. 200. 140. ANSWER DOWNLOAD EXAMIANS APP
Illumination Solid angle is expressed in terms of steredians. radians / meter. degree. radians. steredians. radians / meter. degree. radians. ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to limit the flow of current. None of these. provide a kick start when voltage is induced. both ‘a’ and ‘b’. limit the flow of current. None of these. provide a kick start when voltage is induced. both ‘a’ and ‘b’. ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficiency of a fluorescence lamp is 40 lumens / watt. 30 lumens / watt. 70 lumens / watt. 60 lumens / watt. 40 lumens / watt. 30 lumens / watt. 70 lumens / watt. 60 lumens / watt. ANSWER DOWNLOAD EXAMIANS APP
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