🧲 MAGNET MANIA
This is the ability of a material to conduct magnetic flux.
What is permeability
Run current through a coil of wire and you create one of these
What is an electromagnet
You need this, a magnetic field, and relative motion to produce electromagnetic induction.
What is a conductor
This hand rule is used to determine the direction of current produced by a generator
What is the Left-Hand Generator Rule
A motor takes electrical energy and turns it into this.
What is mechanical energy
These invisible lines of force make up the total quantity of a magnetic field.
What is magnetic flux
Add a more permeable core to an electromagnet and you increase the concentration of this.
What is magnetic flux
When one coil causes a voltage to appear in another coil, this is happening
What is mutual induction
This hand rule helps determine the relationship between current, magnetic field, and motion in a motor.
What is the Right-Hand Motor Rule
This component in a DC motor reverses the current in the armature windings to keep the motor producing torque in the proper direction.
What is the commutator
This type of material can be weakly magnetized in the opposite direction of an applied magnetic field.
What is diamagnetic
The more of these you put around a coil, the stronger its magnetic field can become
What are turns of wire
When a coil produces an induced voltage in itself, it's called this.
What is self-induction
This rule uses your left hand to show the relationship between the magnetic field and current around a coil.
What is the Left-Hand Coil Rule
This theory says current flows from positive toward negative.
What is conventional current flow theory
This is a magnet that can hold its magnetism for a long period of time
What is a permanent magnet
When magnetic domains are lined up and adding more current doesn't make the electromagnet much stronger, you've reached this condition
What is saturation
This law says an induced voltage opposes the change that caused it
What is Lenz's Law
When using the Right-Hand Motor Rule, the conductor is initially assumed to be doing this.
What is stationary
This is the point on an AC sine wave where the current changes direction
What is the zero point
In a magnetic circuit, this is the "electrical resistance" of the magnetic world
What is reluctance
This is the phenomenon that allows electrical energy to be converted into rotating mechanical force in a motor
What is electromagnetism
Make this stronger and you can increase the voltage produced by electromagnetic induction.
What is the magnetic field
If your motor is turning because a current-carrying conductor is interacting with a magnetic field, you're seeing this principle in action
What is motor action
Natural events, electrical equipment, and poorly functioning devices can all cause this unwanted electrical noise
What is electromagnetic interference (EMI)