What is the difference between Resistance and Resistivity.?

Question

Answer

The SI unit of the resistance is OHM, and the SI unit of resistivity is OHM-METER.,,, The resistance of the material DEPENDS on the length, cross-section and area of conductor whereas the resistivity DEPENDS on the nature and temperature of the material...

Answer

RESISTANCE is the property of any object or conductor due to which it resist or oppose the flow of current through it.RESISTIVITY is the fixed resistance of a conductor or object.HOPE HELP U.

Answer

Resistance - (1)-It is the opposition to the flow of electric current through a conductor.
(2)-S.I unit is ohm.

Resistivity:(1)-It is the resistance of a meter cube of a wire.
(2)-S.I unit is ohm-meter..

Answer

Answer

Resistance:
Resistance refers to the opposition a material offers to the flow of electric current. It is the property of a substance or an object that determines how easily it allows the flow of electric charge through it. The unit of resistance is the ohm (Ω).

Resistivity:
Resistivity, on the other hand, is a characteristic property of a material that quantifies its resistance. It is an intrinsic property and depends on the material's composition, temperature, and dimensions. Resistivity is denoted by the Greek letter rho (ρ) and is measured in ohm-meters (Ω·m).

Differences:

Definition:
- Resistance is the measure of how much a material resists the flow of electric current.
- Resistivity refers to the inherent property of a material that determines its resistance per unit length and unit cross-sectional area.

Dependence:
- Resistance depends on both the material's resistivity and its dimensions.
- Resistivity depends solely on the material's composition and temperature, irrespective of its dimensions.

Formula:
- Resistance is calculated using Ohm's law: R = V/I, where R is resistance, V is voltage, and I is current.
- Resistivity is calculated using the formula: R = (ρ * L) / A, where R is resistance, ρ is resistivity, L is the length of the material, and A is the cross-sectional area.

Measurement:
- Resistance is measured using an ohmmeter or a multimeter.
- Resistivity is determined through specific experiments and calculations using the dimensions of the material.

Application:
- Resistance is used to determine the current flowing through a circuit and is essential in designing electrical circuits.
- Resistivity is used to compare and select materials for specific applications, such as in the design of electrical wires and components.

In summary, resistance refers to the opposition to current flow, while resistivity is a property that quantifies the resistance of a material. Resistance depends on both resistivity and dimensions, whereas resistivity solely depends on material composition and temperature. Both resistance and resistivity play crucial roles in understanding and designing electrical circuits.

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