   Chapter 16, Problem 11P

Chapter
Section
Textbook Problem

An electron is at the origin, (a) Calculate the electric potential VA at point A, x = 0.250 cm. (b) Calculate the electric potential VB at point B, x = 0.750 cm. What is the potential difference VB − VA? (c) Would a negatively charged particle placed at point A necessarily go through this same potential difference upon reaching point B? Explain.

(a)

To determine
The potential at A.

Explanation

Given info: The charge (q) of the electron is 1.6×1019C . The distance (r) from origin is 0.250 cm.

Explanation:

Formula to calculate the potential is,

VA=keqr

• ke is the Coulomb constant.

Substitute 1.6×1019C for q, 0.250 cm for r and 8.99×109 Nm2C2 for ke .

VA=(8.99×109 Nm2C2)(1

(b)

To determine
The potential at B and the potential difference.

(c)

To determine
The potential difference of negatively charged particle at B.

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