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 18.5 lux. 12.5 lux. 17.5 lux. 13.5 lux. 18.5 lux. 12.5 lux. 17.5 lux. 13.5 lux. ANSWER DOWNLOAD EXAMIANS APP
Illumination The illumination of the surface varies directly with cosine of the angle between normal to surface and direction of the inclined light is given by Lambert’s cosine law. both A and B. law of square inverse. None of these Lambert’s cosine law. both A and B. law of square inverse. None of these ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Luminous flux Illuminance Luminance Luminous Intensity Luminous flux Illuminance Luminance ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela is the unit of which? Frequency. Wavelength. Luminous intensity. Luminous flux. Frequency. Wavelength. Luminous intensity. Luminous flux. ANSWER DOWNLOAD EXAMIANS APP
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 Which lamp is best suited for lighting an International sports arena? Compact Fluorescent Incandescent Metal Halide LED Compact Fluorescent Incandescent Metal Halide LED ANSWER DOWNLOAD EXAMIANS APP