Answer :

Equation E = k | Q | r 2 can be used. To determine the size of the electric field, use E = k | Q | r 2. The sign of the charge, which is negative in this instance, determines the direction of the electric field. 1.5 10 9 C | E = k | Q | r 2 = (8.99 10 9 N m 2 /C 2) (0.035 m) 2 = 1.1 × 10 4 N/C.

A positive point charge is pointed straight away by the electric field, and a negative point charge is pointed directly in. A positive point charge is pointed straight away by the electric field, and a negative point charge is pointed directly in. Going away from the point charge, the electric field's strength diminishes as 1 / r 2 1/r2 1/r21, r, squared.

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