What is the relationship between magnetic flux density and magnetic field strength?
Answers
Answer:
Explanation:
Magnetic field strength is one of two ways that the intensity of a magnetic field can be expressed. Technically, a distinction is made between magnetic field strength H, measured in amperes per meter (A/m), and magnetic flux density B, measured in Newton-meters per ampere (Nm/A), also called teslas (T).i hop it will help you
Answer:
relationship between
The "magnetic field strength". Usually given the symbol H. Measured in amps per metre (A/m).
The "magnetic flux density". Usually given the symbol B. Measured in teslas (or microteslas or gauss).
In electromagnetism theory, it is absolutely clear that these are different quantities and you need to be precise about which you are measuring.
But for many practical purposes, the two are related by a simple numerical relationship:
B=μ0H
where μ0 is a constant - it's called the permeability of free space and has a value (in SI) 4π.10-7
To be more precise, we can write out the full relationship:
B=μrμ0H
That second constant we've introduced, μr, is called the relative permeability. For non-magnetic materials - for air, most building materials, the human body, etc - it has a value of very nearly 1. Which is why it's usually sufficiently correct just to say B=μ0H