5 important Differences between resistance and resistivity

Understanding the differences between electric resistance and electric resistance is identical important as they are closely related. This article aims to bring you clearness on resistor and electric resistance by comparing each of their properties, definitions and formula .

Introduction

Every object posses some come of opposition to the flow of electric current. If the aim is a conductor, this opposition results in department of energy personnel casualty occurs in the kind of heat within them. The place of any object to oppose electric current is known as resistance. The term electric resistance is used to quantify resistor. here are a few winder differences between resistance and electric resistance. Let ’ s get down with their definitions .

Definition of resistivity

Electrical resistivity is defined as the measure of opposition of unit volume of an object to electric current flow. To understand this definition better, assume that we have a solid cube of bull with us and we measure underground between any two opposite faces of the cube using an ohm-meter. then electric resistance indicated by the ohm-meter is known as electric electric resistance of copper. The rule of electric resistance is :

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Where ‘ R ’ is the resistance of the object, ‘ fifty ‘ is the distance of the object and ‘ A ‘ is its area. The SI unit of measurement of immunity is Ohm-meter .

Definition of resistance

Electrical resistance is defined as the measure of total opposition of an object to electric current flow. The immunity of an object depends on two factors : The material of the object and it physical dimensions. resistance can be calculated from the given area of cross-section, duration and electric resistance of an object using the postdate recipe :
Where ‘ \rho ‘ is the resistivity of the object, ‘ liter ‘ is the distance of the object and ‘ A ‘ is its sphere. The SI unit of resistance is Ohm. now let us compare the electric resistance and resistance for better sympathize.

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Comparison of resistance and resistivity

The differences between resistance and electric resistance can be better understood from the following comparison :
ResistanceResistivityResistance is the total opposition of an object to current flow.Resistivity is a more standardized term to quantify the resistance of an object. It is the amount of resistance offered per cubic meter of an object.The SI unit of resistance is Ohm.The SI unit of resistance is Ohm-meter.SI base unit of resistance is kg.m2·s-3·A-2.SI base unit of resistivity is kg⋅m3⋅s−3⋅A−2.Resistance depends on the physical dimensions of the object and its resistivity of the object at a particular temperature.Resistivity depends on the material and temperature coefficient of the object.For a particular material of an object at a specific temperature, the resistance varies with the physical dimensions of the object.For a particular material of an object at a specific temperature, the resistivity remains constant always.It is represented by the letter ‘R’.It is represented by the Greek letter ‘ρ’.

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Resistance vs Resistivity: Key points to remember:

  1. Resistance varies with the size and shape of an object whereas resistivity is a more standardized quantity that remains the same for a specific temperature and material of the object.
  2. The SI unit of resistance is Ohm whereas that of resistivity is ohm-meter.
  3. Resistance is represented by the letter ‘R’ whereas resistivity is represented by the Greek letter ‘ρ’.
  4. The resistance and resistivity of superconductors are zero.

resistance and electric resistance are very closely refer terms that tell how much an aim opposes the current flow through them. These terms can be a little confuse in the begin. resistance is the sum opposition whereas electric resistance is the confrontation per cubic meter at a particular temperature. Hope this article makes the differences between underground and electric resistance more clear to you.

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