Illumination The work of ballast in a fluorescent tube is to 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’. provide a kick start when voltage is induced. 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 140. 150. 200. 30 140. 150. 200. 30 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 2:1 1:2 1: 2√2 2√2 : 1 2:1 1:2 1: 2√2 ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the work of a driver in case of an LED? To convert AC to DC None of these To convert DC to AC Both ‘a’ and ‘b’ To convert AC to DC None of these To convert DC to AC Both ‘a’ and ‘b’ ANSWER DOWNLOAD EXAMIANS APP
Illumination Wave length for red colour is around 500 nm. 400 nm. 700 nm. 600 nm. 500 nm. 400 nm. 700 nm. 600 nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination Unit of luminous flux is lux. steradians. lumens. candela. lux. steradians. lumens. candela. ANSWER DOWNLOAD EXAMIANS APP
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