AC versus DC questions
Current:
Flow of Electrical charge carriers.
Electrical charge:
To experience a force in electromagnetic fields.
They can be positive or negative.
Electromagnetic field:
Produced by electrically charged objects.
Alternating Current:
Electric current periodically reverses its direction.
Impedance:
Flow of Electrical charge carriers.
Electrical charge:
To experience a force in electromagnetic fields.
They can be positive or negative.
Electromagnetic field:
Produced by electrically charged objects.
Alternating Current:
Electric current periodically reverses its direction.
Direct Current:
Difference between AC and DC current:
| FEATURES | AC | DC |
|---|---|---|
| Power factors | zero and one. | one. |
| Types | Sinusoidal, trapezoidal, triangular and square. | Pure and pulsating. |
| Passive parameters | Impedance. | Resistance only. |
| Obtained from | Generator, mains. | cells or battery. |
| Frequency | 50 hz or 60 hz depends upon country. | zero. |
| Cause of direction of flow of electron | Rotating magnet along wire | Steady magnetism along wire. |
| Amount of energy that can be carried | Safe to transfer over longer city or distance. | Cannot travel. |
| Current | Varying | Constant |
Impedance:
Measure of opposition that a circuit presents to a current when voltage is applied.