A charge of uniform density (29 nC/m) is distributed along the x axis from the origin to the point x = 20.9 m. What is the electric potential (relative to zero at infinity) at a point, x = 79 m, on the x axis?
A charge of uniform density (29 nC/m) is distributed along the x axis from the origin to the point x = 20.9 m. What is the electric potential (relative to zero at infinity) at a point, x = 79 m, on the x axis?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:**Problem Statement:**
A charge of uniform density (29 nC/m) is distributed along the x-axis from the origin to the point \( x = 20.9 \text{ m} \). What is the electric potential (relative to zero at infinity) at a point \( x = 79 \text{ m} \) on the x-axis?
**Explanation for the Graphs/ Diagrams:**
There are no graphs or diagrams provided in this image. If a detailed explanation or solution involving graphical representation or a diagram is required, one could consider visualizing the problem as follows:
1. **Coordinate System:**
- Draw the x-axis, marking the origin at \( x = 0 \) and extending to \( x > 20.9 \text{ m} \).
2. **Charge Distribution:**
- Illustrate the uniformly distributed charge segment from \( x = 0 \text{ m} \) to \( x = 20.9 \text{ m} \).
3. **Point of Interest:**
- Indicate the point \( x = 79 \text{ m} \) where the electric potential is to be calculated.
This setup would help visualize the scenario for deriving the electric potential due to a line charge.
**Solution Outline:**
To solve the given problem, understand the following steps:
1. **Break the Uniform Line Charge:**
- Consider a small element of charge \( dq \) at a distance \( x \) from the origin within the line segment \( 0 \leq x \leq 20.9 \text{ m} \).
2. **Expression for \( dq \):**
- Let \( λ \) be the charge density (λ = 29 nC/m), then \( dq = λ \, dx = 29 \times 10^{-9} \text{ C/m} \times dx \).
3. **Electric Potential Contribution \( dV \):**
- The potential due to a small charge element \( dq \) at \( x = 79 \text{ m} \) is given by \( dV = \frac{kdq}{r} \) where \( k \) is Coulomb's constant \( 8.99 \times 10^9 \text{ N·m}^2/\text{C}^2 \), and \( r \) is the distance between the
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