Electric Power Utilization Test Questions


Q.  According to the first law of illumination, the illumination of a surface due to a source of light is

a. Inversely proportional to the distance between the surface and the source of light
b. Inversely proportional to the square of the distance between the surface and the source of light
c. Directly proportional to the distance between the surface and the source of light
d. Directly proportional to the square of the distance between the surface and the source of light



 
 

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