If the candle power is 45cd, then how much flux will be emitted by thi – McqOptions

MCQOPTIONS

1.	If the candle power is 45cd, then how much flux will be emitted by this source?
A.	565.2 lumens
B.	764 lumens
C.	0.00725 lumens
D.	9.20 lumens
Answer» B. 764 lumens

Discussion

No Comment Found

Related MCQs

A 200 CP lamp is hung 4 metres above the centre of a circular area of diameter 5 m. The illumination at the centre of the area will be:
A room 12 m × 12 m is lit by 10 lamps to a fairly uniform illumination of 100 lm/m2. Calculate the utilization coefficient of the room given that the output of each lamp is 1600 lumens.
Illumination level in public area should be around
A factory hall of 80 m × 25 m is required to be illuminated with an illumination of 15 candle per square meter using 120 lamps each having an efficiency of 15 lumens per watts. Assuming an utilization factor and depreciation factor of 0.4 and 0.7 respectively, the estimated wattage of lamps is ______.
If dΦ is the luminous flux incident normally on an area dA, then Illuminance is given as:
A sodium vapour lamp consists of an inner bulb of special glass containing the sodium and inert gas at a pressure of ________ Hg.
A fluorescent tube of 20 W has a luminous flux of:
For precision work the illumination level required is of the order of
Absorptivity of a perfect black body is:
______ is a form of electromagnetic energy radiated from a body which is capable of being perceived by the human eye.