What is the strength of the electric field ep 0.90 mm from a proton?

The electric field strength is inversely related to the square of the distance.so  the strength of the electric field is given by

Here,    is constant depend upon medium and its value is and q is charge and  r is the distance.

Given   and we know the charge of proton, .

Therefore,

6/12=1/2

step-by-step explanation:

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