Electric field intensity, e can be defined as the electric (coulomb) force on a unit test (1c) charge. find the electric field intensity at a distance, d from the center of a +q charged proton. use k as coulombe constant.

Explanation:

Electric field intensity E is defined as the electric (Coulomb) force on a unit test (1 C) charge. Mathematically, it is given by :

The electric force is given by :

Where

Q and q are electric charges

d is the distance between charges

The electric field intensity at a distance d from the center is given by :

So,

Hence, this is the required solution.

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