Calculate Inductance 2 Flashcards
What is meant by inductance?
The ability to store electrical energy in electromagnetic fields.
What is the basic unit of inductance?
The henry.
What is an example of an inductor used in an magneto?
The coil.
Does an inductor in an AC circuit cause the current to lead or lag the voltage?
It causes the current to lag behind the voltage.
How can you find the polarity of an electromagnet?
Hold the electromagnet in your left hand with your fingers encircling the coil in the direction electrons flow (from negative to positive). Your thumb will point to the north pole of the electromagnet.
What is meant by imledance?
The total opposition to the flow of alternating current. It is the vector sum of resistance, capacitive reactance, and inductive reactance.
In what units is impedance measured?
In ohms.
