Equipotential Surfaces Question

Click For Summary

Homework Help Overview

The discussion revolves around the calculation of the magnitude of a point charge based on the radius of an equipotential surface and the potential value associated with it. The subject area is electrostatics, specifically focusing on the relationship between electric potential and point charges.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to apply the formula for electric potential due to a point charge but questions the correctness of their final answer. Participants engage in verifying the arithmetic and the units used in the calculation.

Discussion Status

Participants are actively discussing the arithmetic involved in the calculation and the correct units for the final answer. There is a focus on clarifying the original poster's approach and identifying any errors without reaching a definitive conclusion.

Contextual Notes

There is an emphasis on ensuring the correct unit of charge is used, with discussions about microcoulombs versus coulombs. The original poster's arithmetic is under scrutiny, indicating a potential misunderstanding or miscalculation that remains unresolved.

predentalgirl1
Messages
61
Reaction score
1
[SOLVED] Equipotential Surfaces Question

If the radius of the equipotential surface of point charge is 14.3 m at a potential of 2.20 kV, what is the magnitude of the point charge creating the potential?








have V = [1/4πεo] [q/r]
Given that,
V = 2.20kV = 2200V
r = 14.3m
Therefore,
q = 2200 x 14.3
9.0 x 10^9
= 3.495 x 10-6μC

Correct? Not correct? Please help me!
 
Physics news on Phys.org
Methot is correct. Final ans not correct.

(Do your own arithmetic.)
 
What did I do wrong? Why is my final answer incorrect?
 
What is your final unit, microcoulomb or coulomb?
 
C (3.5 x10^-6 C?)
 
Last edited:
Right.
 

Similar threads

Equipotential surface (test questions)
  • · Replies 19 ·
Replies
19
Views
2K
Question about equipotential lines and the work done moving along them
  • · Replies 8 ·
Replies
8
Views
2K
Strategy for drawing equipotentials
  • · Replies 1 ·
Replies
1
Views
1K
How to picture a radial field around a 3d object?
  • · Replies 3 ·
Replies
3
Views
1K
Calculating work on an electron on an equipotential surface
  • · Replies 11 ·
Replies
11
Views
3K
Resistors and equipotential lines?
  • · Replies 6 ·
Replies
6
Views
3K
Question about equipotential lines and electric fields
  • · Replies 9 ·
Replies
9
Views
14K
Distance between equipotential surfaces
  • · Replies 2 ·
Replies
2
Views
3K
Solving for potential using surface charge density of a sphere
  • · Replies 3 ·
Replies
3
Views
2K
Equipotential Surfaces physics problems
  • · Replies 1 ·
Replies
1
Views
2K