Electron Theory/transformation

Question 1

Definition of impedance?

Answer 1

Total opposition to currant flow

Question 2

How many watts equal 1 Horse power

Answer 2

746w

Question 3

Each time voltage reverses polarity, the currant flow changes ________

Answer 3

Direction

Question 4

What is frequency measured in?

Answer 4

Hertz

Question 5

During one cycle currant flows in how many directions

Answer 5

Two

Question 6

What is capacitance measured in?

Answer 6

Farrads

Question 7

What is resistance

Answer 7

Opposition to the flow of electrons

Question 8

In a series circuit _____ stays the same

Answer 8

Currant

Question 9

Equation for KVA rating

Answer 9

E x I / 1000

Question 10

Equation for heat loss

Answer 10

I squared R

Question 11

What factors into resistance

Answer 11

Size of conductor, length of conductor, type of conductor, Temperature

Question 12

What is electricity?

Answer 12

The flow of electrons through a conductor

Question 13

What is inductance measured in?

Answer 13

Henerys

Question 14

The volt is the unit of electric pressure expressed in ohm’s law as E for ________?

Answer 14

Electromotive force

Question 15

What is polarity?

Answer 15

The direction of currant flow

Question 16

What is permeability?

Answer 16

The ease at which iron conducts magnetic lines of flux.

Question 17

What is inductance?

Answer 17

The act of moving or changing the magnetic field to induce voltage into a conductor

Question 18

What is a nuetral?

Answer 18

Currant carrying conductor at or near ground potential that acts as a return for unbalanced load

Question 19

What does ohms law state?

Answer 19

One volt will push one amp through one ohm

Question 20

What is power (watts)

Answer 20

The rate electrical energy is being used

Question 21

What is currant?

Answer 21

The flow of electrons

Question 22

What is real power measured in?

Answer 22

KW
Kilowatt

Question 23

What is apparent power measured in?

Answer 23

KVA
Kilo volt-ampre

Question 24

What is Reactive power measured in?

Answer 24

KVAR

Question 25

What is ampacity?

Answer 25

The amount of amps that a conductor can carry continuously without exceeding temp rating

Question 26

Amount of currant to fully magnetize the iron core is called?

Answer 26

Exciting currant

Question 27

What is a transformer?

Answer 27

A ratio device that operates on the principal of mutual induction

Question 28

Transformers which transform electrical energy in any part of the circuit between generation and distribution

Answer 28

Power Transformer

Question 29

What is the efficiency of modern day transformers?

Answer 29

96%-99%

Question 30

The process of inducing a voltage in a conductor by action of a magnetic field

Answer 30

Electro-magnetic Induction

Question 31

Capacitance is measured in what?

Answer 31

Farads

Question 32

Farads are a very small unit so line workers use ________________ when around capacitors

Answer 32

KVAR

Question 33

What is ferroresonance?

Answer 33

An unstable, over voltage condition that can occur when a core is excited.