Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Resistance & Resistivity. The basic difference between resistance and resistivity is that resistance restricts the movement of current and resistivity is a feature of substance that discuss the resistance offered by the substance with certain dimensions.
In today’s post, we will have a detailed look at both resistance and resistivity and compare them to find their differences. So let’s get started with the Difference Between Resistance & Resistivity.
Difference Between Resistance & Resistivity
Resistance
- The feature of material due to that it creates a hindrance to the movement of current.
- The formula of resistance is R=ΡL/α.
- The resistance is a term used in the electrical system to explain the opposition that occurs in the flow of current
- Its measuring unit is ohm denoted with omega
- By using the relation among the three terms volts, current, and resistance ohm law was explained. That says V=IR
- The substance that offers the less value of resistance to flow current is called a conductor and that offers a high value of resistance is called the insulator
- High resistance less current flow low resistance high current will flow
- V=IR
- A large portion of any substance defines the resistance offered by that material
- Rubber has less high resistance since it does not have free electrons
- The size and shape of the substance also define the resistance offered.
- If the area of the conductor is less and the length is high it has a large resistance.
- Such a substance that has a 0 value of resistance called a superconductor
- The system’s international unit of resistance is the ohm,
- It is denoted with the R. The main elements that affect the resistance are the length of the conductor, the cross-section area of the conductor, and temperature.
Resistivity
- The resistance offered by the one-meter cube of material is called resistivity.
- Its formula is Ρ=αR/L.
- α is an area of the conductor.
- R is a resistance of substance.
- L is the length of the material.
- Resistivity is called volume resistivity is the resistance offered by the one-meter cube of substance.
- Its inverse is known as conductivity.
- A lower value of resistivity indicates current can pass through a substance
- Resistivity is denoted by a letter called rho.
- Its SI unit is an ohm meter.
Parameters Affecting Resistance
- The common parameters that affect the resistance are given here.
- If the length of the conductor increases with resistance increases.
- If an area of conductor increases resistance decreases.
- The material also affects the resistance.
- Temperature also affects resistance.
What is the difference between resistance and resistivity?
- Resistance is a property of material since it hinders current flow or electron flow. Resistivity is the physical property of certain materials.
What is resistivity in simple words?
- It features materials that define the ability of a material to hinder current flow in it. It is a material property that is based on temperature and also on pressure.
Are specific resistance and resistivity the same?
- Specific resistance is also called resistivity is a material property that explains how much material can affect current flow. resistivity unit is ohm-meter and denoted ⍴
Why is resistivity used instead of resistance?
- Resistance value based on resistivity. Resistivity is the property of a material that helps to make wire or another component. While resistance is a feature of wire.
Which material is the best conductor?
- The good conductor material is pure silver metal. It has a larger number of free electrons that cause the current flow.
Can resistivity be equal to resistance?
- Resistance is equal to the multiple of resistivity (rho) and Length (L), divided by the cross-sectional Area (A) where the current flows. If length to width ratio is 1, resistance is equal to resistivity
Can we use copper wire instead of nichrome?
- Copper has low resistance and a high temperature coefficient it is not used in meter bridges.
Which one is more fundamental, resistance or resistivity?
- Resistivity is material features for opposing current flow while resistance is based on some factors like length, material type, and A area. Resistivity is constant for any material.
What is the difference between variable resistance and resistivity?
- The resistance changes with the physical dimensions of objects for certain materials and at temperature. The resistivity is constant for certain materials at certain temperature values.
What is the difference between surface resistance and resistivity?
- Surface resistivity measured in ohms/square is used for defining insulative materials where high resistance features are required. Surface resistance in ohms is measured for finding static dissipative features of materials where low-resistance features are needed.
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That is a detailed post about the difference between resistance and resistivity if you have any query ask in comments. Thanks for reading. Have a good day.
