What is the charge on the second sphere?

  • Thread starter Thread starter Charanjit
  • Start date Start date
  • Tags Tags
    Charge Sphere
Click For Summary

Homework Help Overview

The problem involves two small plastic spheres with positive electrical charges, exploring the relationship between their charges and the forces acting on them as described by Coulomb's Law. The specific queries focus on determining the charges on the spheres under different conditions.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the implications of the charges being equal versus one being four times the other, questioning the calculations and interpretations of Coulomb's Law. There is also a mention of adjusting parameters such as distance and force in a related problem.

Discussion Status

The discussion has seen some participants clarify their understanding and resolve their queries, while others are still seeking assistance with related calculations. There is a mix of confirmed solutions and ongoing exploration of different scenarios.

Contextual Notes

Some participants are working under specific conditions, such as different distances and forces, which may affect their calculations. The original poster has noted previous answers while seeking further clarification on subsequent parts of the problem.

Charanjit
Messages
48
Reaction score
0
1. Homework Statement

Two small plastic spheres are given positive electrical charges. When they are a distance of 14.2cm apart, the repulsive force between them has a magnitude of 0.220 N.

A. What is the charge on each sphere if the two charges are equal? Ans: 7.02X10^-7
B. What is the charge on first sphere if it has four times the charge of the other?
C. What is the charge on the second sphere?

2. Homework Equations
Coulomb's Law --> F=kQ1Q2/r^2



3. The Attempt at a Solution

Already solved part A. Having trouble with part b. Both have a charge of 7.02X10^-7 C. The second question says if one sphere is 4 times the other, what is the charge. Wouldn't that just be 4 multiplied by 7.02X10^-7? Thats what I did, and its wrong.
 
Physics news on Phys.org
No, that charge is on the spheres if both charges are equal. The distance and force between the spheres is given, and the charges asked if one charge is four times the other one.

ehild
 
Nevermind, got it figured out.
 
Could someone please help me with problem B, except 17cm apart and the Magnitude 0.300N, looking for Q1, Q2. Any help would be e great, I already got problem A answered which is 0.98*10^-6C.
 
If Q2 is four times Q1 then solve the equation

0.3N =k*4Q1*Q1/0.17^2.

ehild
 

Similar threads

Induced charge on a conducting sphere sliced by a plane
  • · Replies 2 ·
Replies
2
Views
2K
Understanding the Interaction Between a Charged Rod and a Metal Sphere
  • · Replies 6 ·
Replies
6
Views
3K
Charge rearrangement on conducting spheres
  • · Replies 21 ·
Replies
21
Views
5K
Point charge with very thin metal sheet along a spherical surface
  • · Replies 21 ·
Replies
21
Views
2K
Kinetic and potential energy of a particle attracted by charged sphere
  • · Replies 6 ·
Replies
6
Views
2K
How to Rank Charge Density of Conductive Spheres?
  • · Replies 61 ·
3
Replies
61
Views
5K
Determine the net charge of sphere C
  • · Replies 2 ·
Replies
2
Views
2K
Rank charges in spheres (Physics 2)
  • · Replies 1 ·
Replies
1
Views
1K
How can voltage between unlike charges decrease with proximity?
  • · Replies 4 ·
Replies
4
Views
1K
Find charge inner/hollow sphere
  • · Replies 2 ·
Replies
2
Views
2K