How are DC and AC signals amplified

Difference between AC and DC voltage

The main difference between AC and DC voltage is that with AC voltage, the polarity of the wave changes over time, while the polarity of the DC voltage always remains the same. The other differences between AC and DC voltage are shown in the comparison table below.

Content: AC voltage versus DC voltage

    1. Comparison table
    2. definition
    3. Main differences

Comparison table

Basis of comparison AC voltage DC voltage
definitionThe alternating voltage is the force that dissipates the alternating current between the two points. The DC voltage induces the DC current between the two points.
Symbolic illustration
frequency Depending on the country. zero
Power factor Is between 0 and 1. 0
polarity Changes Stay the same
directionVary Stay the same
Received from generator Cell or battery
Efficiency High Low
Passive parameter Impedanceresistance
amplitude To haveDon't have
conversionThrough the inverter With rectifier.
transformer Required for transfer.Not mandatory
Phase and neutral To haveDon't have
advantages Easy to measureJust reinforce

Definition of alternating voltage

The voltage that causes the alternating current is known as the alternating voltage. The alternating current induces in the coil when the current-carrying conductor rotates in the magnetic field. When the conductor rotates, it interrupts the magnetic flux and the change in flux induces the alternating voltage in the conductor.

Definition of DC voltage

The direct voltages induce the direct current. The waves only go in one direction and the level of tension always remains constant. The generation of the direct voltage is very simple and easy. The voltage is induced by rotating the coil in the field of the magnet. The coil consists of a split ring and a commutator, which converts the alternating voltage into direct voltage.

Main differences between AC and DC voltage

  • The voltage that causes the alternating current is called the alternating voltage. The direct voltage generates the direct current.
  • The frequency of the AC voltage depends on the country (mostly 50 and 60 Hz are used). Meanwhile, the frequency of the DC voltage becomes zero.
  • The power factor for AC voltage is between 0 and 1. The power factor for DC voltages always remains 1.
  • The polarity of the alternating voltage always varies with time and the polarity of the direct voltage always remains constant.
  • The AC voltage is unidirectional and the DC voltage is bidirectional.
  • The generator generates the AC voltage and the DC voltage is obtained from the cell or battery.
  • The efficiency of the alternating voltage is high compared to the direct voltage.
  • The impedance is the passive parameter of the alternating voltage and for direct current the resistance. Impedance is the resistance that voltage offers to the flow of current.
  • The alternating voltage has an amplitude, while the direct voltage has no amplitude. The term amplitude means the maximum distance that is covered by the oscillation and the oscillating body.
  • The inverter converts the direct current into alternating current. The rectifier converts the alternating current into direct current.
  • The transformer is essential for AC transmission while it is not used in DC transmission.
  • The AC voltage has phase and neutral, whereas the DC voltage requires neither phase nor neutral.
  • The main advantage of AC voltage is that it is easy to measure. The advantage of DC voltage is that the voltage can be easily amplified. Gain is the process by which the signal strength increases.

Relationship between AC and DC voltage

AC voltages 1.414 = DC voltages