ELEP0623-ch 6 Magnetism & Electromagnetism

What are the two types of permeabilities possessed by every medium?

Absolute permeability (μ₀) and relative permeability (μᵣ).

How is the force between two magnetic poles determined?

The force is directly proportional to their pole strengths and inversely proportional to the square of the distance between them.

What is the unit of magnetic field strength (H)?

The unit of magnetic field strength (H) is A/m (ampere per meter).

What does the magnetic potential represent?

The work done in moving a unit magnetic pole from infinity to a point in the magnetic field.

What is the definition of flux density (B)?

Flux density is the total magnetic flux passing per unit area through a plane at right angles to the direction of the flux.

What is the relationship between magnetic field strength (H) and ampere-turns?

H is proportional to the total ampere-turns in the magnetic circuit.

How is the magnetic circuit analogous to an electric circuit?

Both have similar laws, such as Ohm's law, where current in electric circuits is analogous to magnetic flux in magnetic circuits.

What is meant by the Curie point?

It is the temperature at which a ferromagnetic material becomes paramagnetic, losing its permanent magnetic properties.

What is the significance of the Biot-Savart Law?

It expresses the magnetic field generated by a current-carrying conductor at a point in space.

What happens when a current-carrying conductor is placed in a magnetic field?

It experiences a force acting perpendicular to both the direction of the current and the magnetic field.