Single Phase Theory I - Elea 1834

Front 1

What is XL?

Back 1

Inductance Reactance

Front 2

What is F?

Back 2

Frequency

Front 3

What is hz?

Back 3

Frequency

Front 4

What is L?

Back 4

Inductor

Front 5

What is henry?

Back 5

L

Front 6

What do you find Epeak when you have Erms?

Back 6

Divide it by .707

Front 7

How do you find Erms when you have Epeak?

Back 7

Multiply it by .707

Front 8

How do you find the Eavg when you have Erms?

Back 8

Erms x .9

Front 9

Define Trig

Back 9

SOH CAH TOA

Sin = Opposite/Hypotenuse

Cos=Adjacent/Hypotenuse

Tan=Opposite/Adjacent

Front 10

How do you find power Factor?

Back 10

PF=True Power / Apparent Power

TP/VA

Front 11

What is EMF?

Back 11

Potential Difference

Front 12

What is Apparent power?

Back 12

VA

Front 13

In a parallel circuit is the voltage across the resistor and the voltage across the inductor in phase?

Back 13

Yes

Front 14

In a parallel circuit, will the current flow through the inductor be less than 90 degrees out of phase?

Back 14

Yes

Front 15

Whats Magnetic Induction

Back 15

When you take a Ferromagnetic material and bring it near a magnet, it will become magnetized.

Front 16

Name three substances that forum natural magnets?

Back 16

Iron, Nickel and Cobalt

Front 17

What produces a magnetic field due to a current flow?

Back 17

Electromagnet

Front 18

Whats magnetic saturation?

Back 18

It occurs when all the molecules are lined up in a magnet

Front 19

Whats a inductor?

Back 19

A Coil

Front 20

Whats inductance?

Back 20

Opposing a change of current (L)(H)

Front 21

Whats reactance?

Back 21

The current-limiting property of a inductor

Front 22

What will you lose in a core of a iron core inductor

Back 22

Eddy Current and Hysteresis

Front 23

What is residual magnetism?

Back 23

It is the polarized field that remains after current flow has stopped

Front 24

What is Electromagnetic induction?

Back 24

When a conductor cuts magnetic lines of force and a voltage is induced into the conductor.

Front 25

In electromagnetic induction, increasing the length of the conductor is normally done by

Back 25

Adding more turns to the loop

Front 26

The number of cycles completed in one second is called the

Back 26

Frequency

Front 27

Another term used to indicate the same as the RMS value is the _____ Value?

Back 27

Effective

Front 28

If an AC waveform is rectified and thereby converted into DC, the voltage value that results is the _____ Value

Back 28

Average

Front 29

The power calculated for a pure inductance is a stated in the units of

Back 29

Reactive Power

Front 30

Reactive power of a inductor has the symbol of

Back 30

VARs

Front 31

In a RL circuit, what is known as apparent power?

Back 31

VA

Front 32

Circuits are generally considered to contain ____ when any type of load that contains a coil is used

Back 32

Inductance

Front 33

When a voltage is continually being induced in a coil the voltage is called

Back 33

Induced voltage

Front 34

The current-limiting property of an inductor is called ____?

Back 34

reactance?

Front 35

The symbol for reactance is???

Back 35

X

Front 36

the symbol XL stands for???

Back 36

Inductive reactance

Front 37

The unit of inductance is the ?

Back 37

Henry or L

Front 38

Volt-Amperes Reactive (VARs) is used to measure the _____ in a pure inductive circuit

Back 38

Reactive power

Front 39

Reactive power of an inductor has the symbol of?

Back 39

VARs

Front 40

The amount of resistance compared with the inductive reactance determines the ____ of the coil

Back 40

Quality

Front 41

The total current-limiting effect is called

Back 41

Impedance

Front 42

What is inductance

Back 42

Property of a circuit that tends to oppose any change of current

Front 43

What is the unit of inductance?

Back 43

L or Henry

Front 44

What is another name for magnetic lines of force?

Back 44

Flux

Front 45

Magnetic shields or screens are made orf material with a ____ reluctance

Back 45

Low

Front 46

Magnetism can be explained in terms of ______ spin patterns

Back 46

Electron

Front 47

Name three substances that can form natural magnets

Back 47

Iron, Nickel and cobalt

Front 48

How is the strength of an electromagnet increased?

Back 48

More turns of wire

Add a core

Front 49

What is known as wattles power?

Back 49

VARs

Front 50

What is known as apparent power?

Back 50

VA

Front 51

Whats reluctance

Back 51

The resistance to magnetism

Front 52

Whats frequency

Back 52

Cycles/Sec = Hz

Front 53

Inductance is measured how?

Back 53

Henrys