ICSE Class 9 Answered
Distinguish between direct current and alternating current.
Asked by Vishal | 31 Jan, 2018, 07:40: PM
Expert Answer
| Alternating Current | Direct Current | |
|---|---|---|
| Amount of energy that can be carried: | Safe to transfer over longer city distances and can provide more power. | Voltage of DC cannot travel very far until it begins to lose energy. |
| Cause of the direction of flow of electrons: | Rotating magnet along the wire. | Steady magnetism along the wire. |
| Frequency: | The frequency of alternating current is 50Hz or 60Hz depending upon the country. | The frequency of direct current is zero. |
| Direction: | It reverses its direction while flowing in a circuit. | It flows in one direction in the circuit. |
| Current: | It is the current of magnitude varying with time | It is the current of constantmagnitude. |
| Flow of Electrons: | Electrons keep switching directions - forward and backward. | Electrons move steadily in one direction or 'forward'. |
| Obtained from: | A.C Generator and mains. | Cell or Battery. |
| Passive Parameters: | Impedance. | Resistance only |
| Power Factor: | Lies between 0 & 1. | it is always 1. |
| Types: | Sinusoidal, Trapezoidal, Triangular, Square. | Pure and pulsating. |
Answered by Abhijeet Mishra | 01 Feb, 2018, 01:14: PM
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