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? 1:2 2:1 2√2 : 1 1: 2√2 1:2 2:1 2√2 : 1 1: 2√2 ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the work of a driver in case of an LED? None of these 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 ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficiency of a fluorescence lamp is 70 lumens / watt. 60 lumens / watt. 40 lumens / watt. 30 lumens / watt. 70 lumens / watt. 60 lumens / watt. 40 lumens / watt. 30 lumens / watt. 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 200. 150. 30 140. 200. 150. 30 140. ANSWER DOWNLOAD EXAMIANS APP
Illumination Unit of luminous flux is lumens. steradians. lux. candela. lumens. steradians. lux. candela. ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the total flux emitted by a source of 60 candle power? 0.001326 lumens. 60 lumens. 754.2 lumens. None of these. 0.001326 lumens. 60 lumens. 754.2 lumens. None of these. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS