Electromagnetism/Permeability Question

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In summary, the conversation discusses the force exerted by an electromagnet with specific characteristics and how it changes when certain modifications are made. These modifications include increasing the current to 6.0 A, increasing the number of turns in the coil to 1400, and considering both changes simultaneously. The equations that relate current and number of turns to the force exerted by an electromagnet are relevant to solving this problem.
  • #1
blarginsnarf
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Homework Statement


An electromagnet is able to exert a force of 1.5x10^2 N when lifting an object. The electromagnet has 1000 turns, a current of 1.5A, and a material in the core with a relative magnetic permeability of 2.0 x 10^3. What force will the electromagnet exert if the following changes are made, each considered separately?

a) The current is increase to 6.0 A.

b) The number of turns in the coil is increased to 1400 without increasing the length of the coil

c) All of the above changes are considered simultaneously.

Homework Equations


My textbook shows absolutely NO equations relating to permeability. Thus, I literally have no idea what to do :S
 
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  • #2
Doesn't ask you about permiability.
You just need to know about proportionality.

a) the current is 4x
b) you have 1.4 (that's almost the square-root of two) times the turns per unit length.

You have equations that relate how #turns and current to an electromagnet.
What's the problem?
 

Related to Electromagnetism/Permeability Question

1. What is electromagnetism?

Electromagnetism is a branch of physics that deals with the interactions between electrically charged particles and their surrounding electromagnetic fields. It encompasses both electricity and magnetism and explains the behavior of these forces.

2. How is electromagnetism related to permeability?

Permeability is a measure of how easily a material can be magnetized by an external magnetic field. In electromagnetism, permeability is directly related to the strength of the magnetic field created by an electric current in a material. A material with high permeability will experience a stronger magnetic field than a material with low permeability for the same amount of electric current.

3. What is the difference between magnetic permeability and electrical permeability?

Magnetic permeability refers to a material's ability to be magnetized by an external magnetic field, while electrical permeability refers to a material's ability to be polarized by an external electric field. Both properties play a role in the overall behavior of electromagnetic fields.

4. How does permeability affect the strength of an electromagnet?

The higher the permeability of a material, the stronger the magnetic field produced by an electromagnet. This is because higher permeability allows for a greater alignment of magnetic domains within the material, resulting in a stronger overall magnetic field.

5. What factors can affect the permeability of a material?

Permeability can be affected by factors such as the material's composition, temperature, and external magnetic fields. Materials such as iron, nickel, and cobalt have high permeability, while materials like air and vacuum have low permeability.

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