What Is the Difference Between H Field and B Field in a Solenoid?

In summary, the conversation discussed understanding the magnetic field in a solenoid with an air gap. The H field was defined as the magnetic field strength, while the B field was defined as the flux density. The purpose of these fields was also explained. Additionally, simplifying the calculation for H was mentioned.
  • #1
anon6912
21
3
This is a slide from my lecture illustrating how to find the magnetic field in a solonoid with an air gap.

I don't quite understand the following points:
What is the H field?
Whats the difference between the H field and the B field?
Why do you need them?

Other than that i understand how to do the integral and the evaluation. I just don't understand what the H field is.

EDIT: I attached a nother slide about the H field
 

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  • #2
H is the magnetic field strength while B is the flux density. The strict definition of H is

H = B / μ0 - M where M is the magnetisation

However it is usually possible to simplify the calculation

H = B / μ

look at http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfield.html or search for "magnetic field strength H" and you will most likely find what you need
 

FAQ: What Is the Difference Between H Field and B Field in a Solenoid?

What is a magnetic field?

A magnetic field is an invisible force that surrounds magnets and electric currents, exerting a force on other magnets and electrically charged particles.

How do you calculate the strength of a magnetic field?

The strength of a magnetic field can be calculated using the formula B = μ0(I/2πr), where B is the magnetic field strength, μ0 is the permeability of free space, I is the current, and r is the distance from the magnet or current.

How does the direction of a magnetic field affect objects?

The direction of a magnetic field determines the direction of the force it exerts on other magnets and electrically charged particles. Objects with opposite magnetic poles will attract each other, while objects with the same magnetic pole will repel each other.

What is the difference between a magnetic field and an electric field?

A magnetic field is created by moving electric charges, while an electric field is created by stationary electric charges. Additionally, a magnetic field can only exert a force on moving electric charges, while an electric field can exert a force on both moving and stationary electric charges.

How can magnetic fields be used in everyday life?

Magnetic fields have a variety of everyday uses, such as in motors, generators, speakers, and credit cards. They are also used in medical imaging techniques such as MRI scans and in compasses for navigation.

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