COMPARISON BETWEEN AC & DC
1.Difference between AC & DC in tabular form
| AC (Alternating Current) | DC (Direct Current) |
|---|---|
| 1. AC is developed by NIKOLA TESLA | 1. DC is developed by THOMAS EDISON |
| 2.Ac is safe to transfer over longer city distance & provides more power (EFFICIENT) | 2. DC is for short distances. It losses more energy during travelling far distance . Provides less power (INEFFICIENT) |
| 3. Rotating magnetism along the wire. | 3. Steady magnetism along the wire. |
| 4. FREQUENCY of AC is 50-60 Hz depending on places (countries) | 4. FREQUENCY of DC is 0Hz |
| 5.It reverses its direction periodically while flowing in a circuit. | 5. It is unidirectional in a circuit. |
| 6. It is the current of magnitude varies with time | 6. Current of magnitude is constant. |
| 7.Electrons keep switching direction (BOTH FORWARD & BACKWARD) | 7. Electrons only move forward. |
| 8.SOURCE of AC is Generator | 8. Source of DC is cell or battery |
| 9. It is Impedance | 9. It is Resistance |
| 10.Lies between 0 & 1 | 10. It is always 1 |
| 11. AC is more complex than DC | 11. DC is simpler than AC |
| 12. There is nothing constant in DC | 12. Everything constant in DC. |
| 13. When graphed AC look like WAVE or sinusoidal structure. | 13. When graphed DC look like two flat line. (PARALLEL LINES) |
| 14. AC is known as long distance current. | 14. DC is known as short distance current. |
| 15. Transformer work in AC | 15. The transformer has no value in DC. |
| 16. AC is not safer compared to DC | 16. DC is safer compared to AC |
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