i want
to calcute my home electricity load and also want to know illuminus calclations
formuly any bdy hlp me plz?
Hello Dear mhrnaseer,
You can measure the load current of your home using clamp
ammeter.
Multiply load current to standard voltages which are usually
220V,which results your home load.
Illumination is defined as “the emitted luminous flux per
unit area is called illumination”.
Mathematically
E=Φ/A (lux).
Illumination at any surface can be calculated by two laws:
1) inverse square law
2) Lambert’s law
1)inverse square law tells that the illumination of a
surface is inversely proportional to the square
of the distance of the surface
from the source.
i.e E «1/d^2
2) Lambert’s law tells that illumination is directly
proportional to cosine of the angle made by the normal to the illuminated
surface with the direction of the incident flux.
i.e E « I cosΘ where I is luminous intensity.
combining the both laws we get
E «(I/d^2)cosΘ
Or
E=(I/d^2)cosΘ