Electrostatic force between charged and neutral object?

In summary, when using Coulomb's Law to calculate the force of attraction between a charged and neutral object, the result may be 0 if the charge of one object is substituted as 0 in the equation. However, in certain cases where the neutral object is able to induce opposite charge on its surface, a net force can still act on the charged particle. This net force depends on the dimensions of the neutral object. In cases where the neutral object is unable to induce charge, such as with a proton and neutron, the force of attraction may be 0.
  • #1
Dragynfyre
20
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.
 
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  • #2
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.
 
  • #3
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?
 

1. What is electrostatic force?

Electrostatic force is a type of force that exists between charged particles, such as electrons and protons. It is caused by the attraction or repulsion of the charged particles and is responsible for many phenomena, such as static electricity.

2. How is electrostatic force calculated?

The electrostatic force between two charged objects can be calculated using Coulomb's law, which states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

3. Can electrostatic force act on neutral objects?

Yes, electrostatic force can act on neutral objects. This is because even neutral objects can have an uneven distribution of charges, causing one part of the object to be more positively or negatively charged than the other.

4. What happens to the electrostatic force when the distance between two charged objects is changed?

The electrostatic force decreases as the distance between two charged objects increases. This is because the force is inversely proportional to the square of the distance between the objects.

5. How does the presence of a third charged object affect the electrostatic force between two charged objects?

The presence of a third charged object can affect the electrostatic force between two charged objects. This is because the third object can either attract or repel the two objects, changing the overall force between them.

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