Difference Between Voltage and Current

The current ane voltage is one of the most commonly asked questions from electricity and electronics engineering. The difference between voltage and current helps the student to understand the basics better and know their comparisons thoroughly. 

Definition of voltage

Voltage is also called the electromotive force,  It is a potential difference in charge between two points in an electric field. In other words energy per unit charge. This is represented of symbol V and the SI unit of V.

Definition of current

While the current is the rate at which electric charge flows past a point in a circuit. In other words, the current is the rate flow of electric charge. The current is represented by a symbol I and the SI unit of I.

The main key difference  between voltage and current are listed below: 

  • The voltage is represented by the symbol of V while the current is represented by the symbol of I.
  • The voltage is defined as the magnetic field around it whereas the current generates the electrostatic field around it.
  • The voltage is denied as the ratio of the work done to the charge, whereas the current is the ratio of the charge to the time.
  • The voltage is the difference between the point in an electric field whereas the current is caused by the flow of the electron in the electric field.
  • The voltage is measured by an instrument called a voltmeter whereas the current is measured by the ammeter.
  • The one volt is equal to the 1 joule/coulomb whereas the one ampere is equal to the one column/second.
  • The polarity of the alternating voltage remains changes and due to this alternating voltage the alternating current induces, but the polarity of the direct voltage remains constant and their effect induces a direct current.
  • In a series circuit, the magnitude of voltage remains different in all the components of the circuit whereas the magnitude of current remains the same.
  • In the parallel circuit, the voltage at all the branches of the circuit remains the same whereas the current is unequally distributed in the circuit component.
  • The voltage drop mainly occurs due to the impedance of the circuit whereas the current drop occurs due to the passive element of the circuit.
  • The voltage is the difference of the electrical charges between the two-point of an electric field whereas the current is the flow of electrical charges between the point of an electrical field.
  • Voltage is the cause of the current, a current is the effect of the voltage; current cannot flow without voltage.
  • Loss of voltage occurs due to impedance while the loss of current due to the passive element.