Magnetism Flashcards
1
Q
What determines the strength of the magnetic field around a conductor?
A
The amount of current
2
Q
What will produce a magnetic field?
A
A current flowing through a conductor
3
Q
When induced currents produce expanding magnetic fields around conductors in a direction that opposes the original magnetic field, this is known as:
A
Lenz’s Law
4
Q
The opposition to the creation of magnetic lines of force in a magnetic circuit known as:
A
Reluctance
5
Q
What is known by “back EMF”?
A
A voltage that opposes the applied EMF.
6
Q
Permeability is defined as:
A
The ratio of magnetic flux density in a substance to the magnetizing force that produces it.
