Illumination Illumination can be expressed in candela. radians. lux. lumens. candela. radians. lux. lumens. ANSWER DOWNLOAD EXAMIANS APP
Illumination Wave length for red colour is around 500 nm. 400 nm. 600 nm. 700 nm. 500 nm. 400 nm. 600 nm. 700 nm. 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? 1: 2√2 2:1 1:2 2√2 : 1 1: 2√2 2:1 1:2 2√2 : 1 ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficacy of a typical HPSV lamp is in between 40 - 70 lm/watt. 10 - 40 lm/watt 70 - 120 lm/watt. 120 - 200 lm/watt. 40 - 70 lm/watt. 10 - 40 lm/watt 70 - 120 lm/watt. 120 - 200 lm/watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to provide a kick start when voltage is induced. None of these. limit the flow of current. both ‘a’ and ‘b’. provide a kick start when voltage is induced. None of these. limit the flow of current. both ‘a’ and ‘b’. ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the work of a driver in case of an LED? None of these To convert DC to AC To convert AC to DC Both ‘a’ and ‘b’ None of these To convert DC to AC To convert AC to DC Both ‘a’ and ‘b’ ANSWER DOWNLOAD EXAMIANS APP
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