Q. 74.3( 9 Votes )

In some old texts it is mentioned that 4π lines of force originate from each unit positive charge. Comment on the statement in view of the fact that 4π is not an integer.

Answer :


Here 4π is considered as a solid angle. Meaning the lines of force can subtend radially outward as shown in the figure below:

It does not mean that 4π lines will come out of a point charge, it means lines of force will move radially outwards from a positive charge having radial angle of 4π.


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