   Chapter 15, Problem 21P

Chapter
Section
Textbook Problem

Charge q1 = 1.00 nC is at x1 = 0 and charge q2 = 3.00 nC is at x2 = 2.00 m. At what point between the two charges is the electric field equal to zero?

To determine
The point at which electric field is zero.

Explanation

Given info: The charges q1=1.00nC and q2=3.00nC are placed at x1=0 and x2=2.00m

Let x be the distance of the point from q1

Formula to calculate the electric field due to q1 is,

E1=keq1x2

Formula to calculate the electric field due to q2 is,

E2=keq2(x2x)2

At the point where the electric field is zero,

E1=E2

Therefore,

keq1x2=keq2

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