P5.1 Alternating current

Question 1

What does AC stand for in electrical terms?

Answer 1

Alternating Current

Question 2

True or False: In an AC circuit, the current flows in one direction only.

Answer 2

False

Question 3

Fill in the blank: The frequency of an AC signal is measured in ______.

Answer 3

Hertz

Question 4

What is the standard frequency of AC in North America?

Answer 4

60 Hz

Question 5

What is the primary advantage of AC over DC?

Answer 5

AC can be easily transformed to different voltage levels.

Question 6

Multiple choice: Which of the following devices typically uses AC?

Answer 6

Electric motors

Question 7

What is the peak value in an AC waveform?

Answer 7

The maximum voltage reached by the waveform.

Question 8

True or False: AC voltage can be represented as a sine wave.

Answer 8

True

Question 9

What is the root mean square (RMS) value of an AC current?

Answer 9

The effective value of the current that produces the same power as a DC current.

Question 10

Fill in the blank: In AC circuits, inductance and capacitance affect the ______ of the circuit.

Answer 10

impedance

Question 11

What type of waveform is commonly used in AC power distribution?

Answer 11

Sine wave

Question 12

Multiple choice: Which component is used to convert AC to DC?

Answer 12

Rectifier

Question 13

What is the phase difference in a purely resistive AC circuit?

Answer 13

0 degrees

Question 14

True or False: An AC generator is also known as an alternator.

Answer 14

True

Question 15

What is the formula to calculate the frequency of an AC signal?

Answer 15

Frequency (f) = 1 / Period (T)