Give me 7 differences between resistance and resistivity.plzzzzzzzz
Answers
Answer:
The resistance is the ratio of the length and cross-section area of the conductor, whereas the resistivity of the material is the ratio of the product of the resistance and area to the length of the conductor. The resistance is represented by the symbol R whereas the resistivity is represented by the symbol ρ.
Resistivity is the physical property of a particular substance which is having particular dimensions. Resistance is directly proportional to the length and temperature while it is inversely proportional to the cross-sectional area of the material.
Explanation:
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Answer:
Difference Between Resistance and Resistivity
Sl. No. Differentiating Property Resistance Resistivity
1 Definition Resistance is the physical property of a substance because of which it opposes the flow of current i.e. electrons. Resistivity is the physical property of a particular substance which is having particular dimensions.
2 Proportionality Resistance is directly proportional to the length and temperature while it is inversely proportional to the cross-sectional area of the material. Resistivity is only proportional to the nature and temperature of the particular material.
3 Symbol R ρ
4 Formula R = V/I or,
R = ρ(L/A)V = Voltage, I = Current, ρ = Resistivity ρ = (R×A)/L
R = Resistance, L= Length, A = Cross-sectional area
5 SI Units The SI unit of resistance is Ohms The SI unit of resistivity is Ohms-meter.
6 Applications The property of resistance is used in several places like heaters, fuses, sensors, etc. Electrical resistivity measurement is used as a quality control test for calcareous soil.
These were the main resistance and resistivity differences that are crucial to understand. Questions based on resistivity and resistance are common in most exams and so, it is important to be thorough with these comparisons.