In this article, you will learn detailed about the topic of Resistance vs impedance. Each term of resistance and impedance will be discussed and differentiated through this article.
Definition
What is resistance
The resistance is defined as the opposition offered to the flow of current in an electrical or electronic circuit is known as resistance. it’s occurring in Dc current. The resistance will remain constant at any range of frequency.
What is impedance
The opposition to the flow of current is in an Ac circuit, it is happening due to the current passage through an inductor, capacitor, and resistor. The impedance will be change according to the Frequency of the current.
Difference between resistance and impedance
Table of difference between resistance and impedance
| BASIS | RESISTANCE | IMPEDANCE |
| Defenition | opposition offered to the flow of current in anelectrical or electronic circuit is knownas resistance | opposition to the flow of current is in an Ac circuit, it is happening due to the currentpassage through an inductor, capacitor, and resistor |
| Elemnts | Is a contribution of the resistive elements. | It is the contribution of resistive elements and reactance. |
| Circuit | Mostly occure in Dc circuit | Most occure in Ac current |
| Frequency | The resistance will be constant at any at any frequency. | The impedance will be changing according to the frequency. |
| Phase angle | Resistance not having phase angle. | impedance having phase angle. |
| Values | Resistance is simple value. | Impedance is complex and contain real and imaginary values. |
| Equation | R = V/I |  |
Method of calculation
Resistance calculation
Calculation of impedance
The various difference between impedance and resistance in detailed
- Resistance is the opposition offered to the flow of current in Dc circuit. And the impedance is the opposition of flow of current in an Ac circuit.
- The resistance is denoted by the symbol of R. Impedance is denoted by the symbol of Z
- The resistance is only contributing to the resistive elements. But the impedance is contributing resistive and reactive elements in a circuit.
- The impedance having both phase angle and magnitude, but the resistance only having magnitudes.
Conclusion: resistance and impedance are relative words. which change according to the input voltage ( Dc or Ac ).
These both are relating to the restriction of the flow of current in a circuit.
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