Asmall object a, electrically charged, creates an electric field. at a point p located 0.250 m directly north of a, the field has a value of 40.0 n/c directed to the south.
what is the charge of object a?

Charge,

Explanation:

Given that,

Electric field, E = 40 N/C

At a point P located 0.250 m directly north of A, d = 0.25 m

We need to find the charge on the object A. The electric field at a distance of r is given by :

So, the charge on object A is . Hence, this is the required solution.                                                                    

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