AC Theory

Question 1

What is the units of inductance and the more common values?

Answer 1

Henry (H)

milli-Henries (mH) and micro-Henries (uH)

Question 2

Equation of frequency

Answer 2

Time (seconds) = 1 / frequency

Question 3

What’s the value of a ships main electrical supply?

Answer 3

3 phase

450 volts

60 hertz

Question 4

How are AC Cycle per seconds expressed?

Answer 4

Hertz (H)

Question 5

The level to which the voltage or current rises to is called?

Answer 5

Amplitude

Question 6

The speed at which AC changes direction is called?

Answer 6

Frequency

Question 7

Advantages of AC over DC

Answer 7

Wiring and equipment can be made much lighter

Using transformers, it is much easier to supply voltages at different values

Question 8

What direction does AC travel through a conductor?

Answer 8

Both (it alternates)

Question 9

What does AC stand for?

Answer 9

Alternating current

Question 10

What does a waveform show?

Answer 10

Shows voltage or currents varying over a period of time

Question 11

What does a waveform show?

Answer 11

Positive peak value

peak negative value

Time

One cycle

Amplitude