
Light and Illuminance Quiz
Quiz
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Physics
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Professional Development
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Practice Problem
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Medium
Umair Syed
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the unit of luminous intensity?
Candela (cd)
Lumen (lm)
Watt (W)
Lux (lx)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the unit of illuminance?
Watt (W)
Candela (cd)
Lumen (lm)
Lux (lx)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the range of illuminance for emergency lighting?
5000 lux
1000 lux
0.2 lux
10000 lux
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the measur of the ability of a lump to convert electrical energy into light energy?
Luminous flux
Efficacy
Illuminance
Luminous intensity
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A source of light has a luminous flux of 3500 lm. The worktop on which the light falls is 1.5 m x 3.5 m. What is the illuminance?
337 lux
447 lux
557 lux
667 lux
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A source of light has a luminous flux of 2,000 lm. The worktop on which the light falls is 3 m x 3 m. What is the illuminance?
200 lux
111 lux
222 lux
333 lux
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