Electrostatic force between charged and neutral object?

Click For Summary
SUMMARY

The discussion centers on the electrostatic force between charged and neutral objects, specifically addressing the apparent contradiction between Coulomb's Law and the Law of Electrostatics. According to Coulomb's Law, the force of attraction is zero when one object is neutral, as substituting zero for charge results in zero force. However, the Law of Electrostatics indicates that a charged object induces an opposite charge on the surface of a neutral object, creating a net attractive force. The magnitude of this force is influenced by the dimensions of the neutral object, highlighting the complexity of electrostatic interactions.

PREREQUISITES
  • Coulomb's Law
  • Concept of induced charge
  • Basic electrostatics principles
  • Understanding of charge distribution
NEXT STEPS
  • Study the concept of induced charge in detail
  • Explore the implications of charge distribution on neutral objects
  • Learn about electrostatic forces in different materials
  • Investigate the limitations of Coulomb's Law in various scenarios
USEFUL FOR

Students studying physics, educators teaching electrostatics, and anyone interested in understanding the principles of charge interactions.

Dragynfyre
Messages
20
Reaction score
0

Homework Statement



Well we just learned about Coulomb's Law today but there is something that is bothering me. According to Coulomb's Law the magnitude of the force of attraction between a charged and neutral object is 0. However, the Law of Electrostatics states that a charged and neutral object should attract each other. I'm wondering is there a special case for calculating the force of attraction when one object is neutral and the other is charged?

Homework Equations



Coulomb's Law

F=kq1q2/r2

The Attempt at a Solution



If 0 is substituted in for q1 in the equation the magnitude of the force becomes 0 no matter what the charge is on the second object.
 
Physics news on Phys.org
Hi Dragynfyre, welcome to PF.

When you bring a charged particle near a neutral object, opposite charge is induces on the near surface of the neutral object and the same charge on the far side of the neutral object. Due to this a net force is acting on the charged particle. The magnitude of the net force depends on the dimension of the neutral object.
 
Ahh okay but say there was an object where the electrons could not move and a charge can't be induced. For example the electrostatic force between a proton and neutron (I know there are quarks and other stuff but let's leave those out of this discussion). Would the force be 0?
 

Similar threads

Replies
21
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 22 ·
Replies
22
Views
4K
Replies
17
Views
3K
Replies
4
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 5 ·
Replies
5
Views
1K
  • · Replies 12 ·
Replies
12
Views
3K
Replies
8
Views
9K