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Electric Field is the region produced by an electric charge around it whose influence is observed when another charge is brought in that region where the field exists.
![Electric Field Formula 1 1 8](https://www.educationidol.in/wp-content/uploads/2022/09/1-8.jpg)
The force F experienced by electric charge q describes the Electric field lines.
Formula of Electric Field
The Electric Field formula is expressed by
![Electric Field Formula 2 2 29](https://www.educationidol.in/wp-content/uploads/2022/09/2-29.gif)
If q and Q are two charges separated by distance r, the Electric force is given by
![Electric Field Formula 3 3 12](https://www.educationidol.in/wp-content/uploads/2022/09/3-12.gif)
![Electric Field Formula 4 4 6](https://www.educationidol.in/wp-content/uploads/2022/09/4-6.gif)
When we substitute the electric force formula in the electric field formula, we get Electric Field Formula which is given by,
If the voltage V is supplied across the given distance r, then the electric field formula is given as
The Electric field is measured in N/C.
Solved Examples
Example 1
A force of 5 N is acting on the charge 6 μ C at any point. Determine the electric field intensity at that point.
Solution
Given
Force F = 5 N
Charge q = 6 μ C
Electric field formula is given by
E = F / q
= 5N / 6×10−6C
E = 8.33 × 105 N/C.