Ac Dc

Question 1

What type of force is Voltage?

Answer 1

is electrical force

Question 2

• Current is electron flow…

Answer 2

through a wire

Question 3

Voltage is measured in?

Answer 3

– Measured in amperage

Question 4

• Current and amperage are…

Answer 4

often used interchangeably

Question 5

• So, volts push what?

– The force on the electrons…

– The amount of electron flow…

Answer 5

electrons through conductors

is in volts

flow in amps

Question 6

Direct Current moves in?

From?

Answer 6

one direction

– Negative to positive

Question 7

Direct Current Can be produced through what reaction?

Answer 7

produced through chemical reaction

Question 8

– A battery’s electrolyte produces what?

Answer 8

produces electrons

Question 9

– Negative end gives away what?

Answer 9

gives away electrons

Question 10

– Positive end collects what?

Answer 10

collects electrons

Question 11

Alternating Current (AC) is produced by what?

• Does it move in one direction?

Answer 11

by a generator

Yea

Question 12

Alternating Current (AC)

Answer 12

• Produced by a generator

Question 13

Cycles and Frequency
• Cycle is what?

Answer 13

– One complete electrical alternation
•

Question 14

Frequency is what?

Answer 14

– Number of cycles in a second

Question 15

• Frequency designations:
What is frequency measured in?

Answer 15

Hertz (Hz)

Question 16

Generating Alternating Current (AC) you need to pass a…

Answer 16

Pass a conductor through a magnetic field

Question 17

Expressing AC with a Sine Wave

A sine wave shows

– First
– Then reverses

Answer 17

how alternating current
flows

in one direction,

to flow in the opposite direction

Question 18

Expressing AC with a Sine Wave

Answer 18

– First in one direction,
– Then reverses to flow in the opposite direction

Question 19

Effective Voltage
• Alternating current sine wave:
Starts at what number?
Then it…
Then returns to?

Answer 19

– Starts at 0,
– Reaches a peak (maximum),

Returns to 0

Question 20

Effective Voltage
• Alternating current sine wave:

What is peak voltage at?

Answer 20

• “Peak voltage” at 90° (electrical degrees)

Question 21

Effective Voltage
• Alternating current sine wave:
What is effective voltage at?

Answer 21

• “Effective voltage” (0.707 x peak voltage)

Question 22

Effective Voltage
• Alternating current sine wave:

Answer 22

• “Effective voltage” (0.707 x peak voltage)

Question 23

Generating Three Phase Alternating Current

• Generated by passing three conductors…

Answer 23

through a magnetic field

Question 24

Generating Three Phase Alternating Current

Answer 24

• Three-phase, 3-Phase, and 3Ø

Question 25

Inductance:

Is the out of phase condition between what two things?

Answer 25

– between voltage and amperage

Question 26

Reactance:
It is what the resistance voltage encounters when

Answer 26

– when it changes flow

Question 27

• Inductive reactance:

–a combination of what two things?

What is it nessecary for?

Answer 27

A combination of inductance and reactance
– starting and running of an induction motor

Question 28

Capacitive Reactance

Capacitors can create an out-of-phase
condition between what two things?

Answer 28

• between voltage and amperage

Question 29

Capacitive Reactance
The voltage lags
That is how capacitors

Answer 29

– behind the amperage (current)
• increase starting
torque