AC and DC

Question 1

Definition of AC:

Answer 1

AC is an electric current that periodically reverses direction, alternating between positive and negative cycles.

In the context of power distribution, AC is the standard for electricity transmission.

Question 2

Waveform of AC:

Answer 2

AC waveforms are typically sinusoidal, although they can take other forms.

The frequency of the AC waveform is the number of cycles per second and is measured in Hertz (Hz).

Question 3

Household Power:

Answer 3

The electricity supplied to homes and businesses is typically AC.

In many countries, including the UK, the standard AC frequency is 50 Hz.

Question 4

Advantages of AC:

Answer 4

Efficient for long-distance power transmission.

Easy voltage transformation using transformers.

Supports polyphase systems for industrial applications

Question 5

Definition of DC:

Answer 5

DC is an electric current that flows in one direction, maintaining a constant polarity.

It is produced by batteries, fuel cells, and rectifiers.

Question 6

Waveform of DC:

Answer 6

DC waveforms are constant over time, with a steady flow of electric charge in one direction.

Question 7

Power Supply DC:

Answer 7

DC is commonly used in electronic devices and low-voltage applications, such as battery-powered devices.

Many electronic components, such as transistors and integrated circuits, operate on DC.

Question 8

Advantages of DC:

Answer 8

Suitable for electronic circuits and devices.

Provides a constant and stable voltage.

Simplifies the design of some electronic systems.