---
title: "Two point charges of equal magnitude \\(q\\) but opposite sign are fixed on the \\(x\\)-axis at \\(x = -d\\) and \\(x = +d\\). Points \\(A\\), \\(B\\), and \\(C\\) lie on the positive \\(y\\)-axis at \\(y = 0\\), \\(y = d\\), and \\(y = 2d\\), respectively. Which of the following correctly ranks the magnitude of the electric field \\(E\\) at points \\(A\\), \\(B\\), and \\(C\\)?"
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url: "https://nerd-notes.com/ubq/117976/"
date_modified: "2026-08-04T08:02:45+00:00"
---

# Two point charges of equal magnitude \(q\) but opposite sign are fixed on the \(x\)-axis at \(x = -d\) and \(x = +d\). Points \(A\), \(B\), and \(C\) lie on the positive \(y\)-axis at \(y = 0\), \(y = d\), and \(y = 2d\), respectively. Which of the following correctly ranks the magnitude of the electric field \(E\) at points \(A\), \(B\), and \(C\)?

Two point charges of equal magnitude \(q\) but opposite sign are fixed on the \(x\)-axis at \(x = -d\) and \(x = +d\). Points \(A\), \(B\), and \(C\) lie on the positive \(y\)-axis at \(y = 0\), \(y = d\), and \(y = 2d\), respectively. Which of the following correctly ranks the magnitude of the electric field \(E\) at points \(A\), \(B\), and \(C\)?

![A horizontal line labeled x-axis and a vertical line labeled y-axis intersect at an origin labeled A. On the x-axis, a positive point charge labeled +q is located to the left of the origin at x = -d, marked with a small open circle containing a plus sign. To the right of the origin at x = +d, a negative point charge labeled -q is marked with a small open circle containing a minus sign. On the positive y-axis, point A is at the origin (0,0). Point B is marked with a filled black dot on the positive y-axis at y = d. Point C is marked with a filled black dot on the positive y-axis at y = 2d, located twice as far from the origin as point B. Dashed vertical lines extend along the y-axis connecting points A, B, and C. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785830565-1MY4DP.jpg)

- **A.** \(E_C > E_B > E_A\)
- **B.** \(E_A = E_B = E_C\)
- **C.** \(E_A > E_B > E_C\)
- **D.** \(E_B > E_A > E_C\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/117976/*