Which of the following lamps is the cheapest for the same wattage?
A) fluorescent tube
B) mercury vapour lamp
C) gls lamp
D) sodium vapour lamp
Correct Answer:
Verified
Q6: Colour of light depends upon
A)frequency
B)wave length
C)both (a)
Q7: Illumination of one lumen per sq. metre
Q8: A solid angle is expressed in terms
Q9: The unit of luminous flux is .
A)watt/m2
B)lumen
C)lumen/m2
D)watt
Q10: Filament lamps operate normally at a power
Q12: On which of the following factors dies
Q13: For the same lumen output, the running
Q14: The flicker effect of fluorescent lamps is
Q15: ...... is a cold cathode lamp.
A)fluorescent lamp
B)neon
Q16: For normal reading the illumination level required
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