MOST ASKED MCQ ON UTILISATION OF ELECTRICAL ENERGY (Part-2)
1. The unit of solid angle isa)Solid Angleb)Radianc)Steradiand)Candela Ans: c2. Candela is the unit ofa)Luminous fluxb)Luminous intensityc)Wavelengthd)None of the above Ans: b 3. The practical luminous efficiency of the sodium vapour lamp is of the order ofa) 25 to 40 lumens per wattb) 40 to 45 lumens per wattc) 45 to 50 lumens per wattd) … Read more