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Ac vs dc explained by experienced electrician

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Differences of AC and DC

Contents: AC Voltage Vs DC Voltage

1. Definition

2. Key Differences

Definition of AC voltage

The voltage that causes alternating current is called voltage alternative. Alternating current induces in the coil as the conductor carrying the current rotates in the magnetic field. The conductor as it rotates interrupts the magnetic flux and the change in flux induces the alternating voltage in the conductor.

Definition of DC Voltage

DC voltages induce DC current.

Waves in one direction only and the voltage amplitude always remains constant. Generating DC voltage is quite simple and easy. The voltage induces the rotation of the coil in the field of the magnet. The coil consists of the split ring and the commutator which converts AC voltage to DC voltage.

Main differences between AC and DC voltages

1. The voltage that causes alternating current is called alternating voltage. DC voltage produces DC current.

2. The frequency of the AC voltage depends on the country (mainly 50 and 60 Hz are used). While the frequency of the DC voltage becomes zero.

3. The AC voltage power factor is between 0 and 1. And the power factor of DC voltages always remains 1.

4. The polarity of AC voltage always varies with time and the polarity of DC voltage always remains constant.

5. The AC voltage is unidirectional and the DC voltage is bidirectional.

6. The generator generates the AC voltage and the DC voltage is obtained from the cell or battery.

7. The efficiency of AC voltage is high compared to DC voltage.

8. Impedance is the passive parameter of AC voltage, and for DC it is resistance. By impedance, we mean the opposition offered by voltage to current flow.

9. AC voltage has amplitude while DC voltage has no amplitude. The term amplitude refers to the maximum distance traveled by the oscillation and the vibrating body.

10. The inverter converts direct current to alternating current. Whereas the rectifier converts alternating current into direct current.

11. Transformer is essential for AC transmission while not used in DC transmission.

12. AC voltage has a phase and a neutral while DC voltage requires neither phase nor neutral.

13. The main advantage of AC voltage is that it is easily measured. The advantage of DC voltage is that the voltage can be easily amplified. Amplification is the process by which signal strength increases.

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