(! 30 pts if answered right. )what formula gives the strength of an electric field, e, at a distance from a known source charge? e = startfraction f subscript e baseline over q times d endfraction. e = startfraction k times q over d endfraction. e = startfraction k times q over d superscript 2 baseline endfraction. e = startfraction f subscript e baseline over d endfraction.

Explanation:

The strength of an electric field E produced by a single charge Q at a distance d from it is given by the formula: , where K represents the Coulomb constant.

Since the electric field E is derived from the Coulomb Force per unit charge using a positive test charge, the field's units will be in units of Newtons/Coulomb, and be the formula for the Coulomb electric force between to charges (Q1 and Q2),

but modified with only one charge showing in the numerator of the expression.