Two point charges q 1 = -5.60 nC, and q 2 = -15.0 nC are separated by 25.0 cm (s

Question

Two point charges q1 = -5.60 nC, and q2 = -15.0 nC are separated by 25.0 cm (see figure below).

Two point charges q1 = -5.60 nC, and q2 = -15.0 nC are separated by 25.0 cm (see figure below). (a) Find the net electric field these charges produce at point A magnitude -15722.51 N/C direction to the right (b) Find the net electric field these charges produce at point B. magnitude N/C direction to the right (c) What would be the magnitude and direction of the electric force this combination of charges would produce on a proton at A? magnitude N direction to the right

Explanation / Answer

a) V = kq/r
V1 = kq1/r = (9x10^9)(-5.60x10^-9)/(0.25m) = -201.6
V2 = kq2/r = (9x10^9)(-15x10^-9)/(0.25m) = -540
V = V1 + V2 = -206+(-540)=-741.6

b)U = kq1q2/r
U = (9x10^9)(-5.60x10^-6)(-15x10^-6)/(0.26m)
U = -2.9kJ

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