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'''Electric Field Strength''' is given by the general formula:
*<math>𝐸=\frac{𝐹}{𝑄}</math>
Where,
The '''Electric field strength''' around a point [[Electrical Charge|charge]] is given by:
*<math>𝐸=𝑘\frac{𝑄}{𝑟_2𝑟^2}</math>
Where:
Since;
*<math>𝑘=\frac{1}{4\pi\varepsilon_0}</math>
Then:
*<math>𝐸=\frac{1}{4\pi\varepsilon_0}\frac{𝑄}{𝑟_2𝑟^2}</math>
or
*<math>𝐸=\frac{𝑄}{4\pi\varepsilon_0𝑟_2varepsilon_0𝑟^2}</math>
Where:
<math>\varepsilon_0</math> is the [[Permittivity of Free Space|permittivity of free space]]