Choose the correct order of electric discharge lamps in their increasing order of efficiencies (lumens/watt) : 

(A) Sodium vapour lamp, Mercury vapour lamp, Neon lamp 

(B) Neon lamp, Sodium vapour lamp, Mercury vapour lamp 

(C) Neon lamp, Mercury vapour lamp, Sodium vapour lamp 

(D) Mercury vapour lamp, Sodium vapour lamp, Neon lamp
asked Apr 30, 2018 in Utilization of electrical energy by
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Choose the correct order of electric discharge lamps in their increasing order of efficiencies (lumens/watt) : 

(A) Sodium vapour lamp, Mercury vapour lamp, Neon lamp 

(B) Neon lamp, Sodium vapour lamp, Mercury vapour lamp 

(C) Neon lamp, Mercury vapour lamp, Sodium vapour lamp 

(D) Mercury vapour lamp, Sodium vapour lamp, Neon lamp

answered Apr 30, 2018 by