Q.

Derive an expression for the intensity due to a point charge

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Detailed Solution

Intensity of Electric field : It is defined as the force experienced per unit positive test charge placed at that point in the field E=FQ
Intensity if electric field due to point charge:
Consider a positive charge is placed at point A. Imagine a test charge Q0 at point P . Which is at a distance 'd' from point 'A'. The force on test charge is
F=14πϵ0QQ0d2
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Intensity of electric field at point P is E=FQ0
E=14π0Qd2 is along the force experienced by the test charge Q0

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