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A physical quantity, associated with electrical conductivity, has the SI unit ohm-meter. Identify this physical quantity.
- a)Specific conductivity
- b)Specific resistance
- c)Resistance
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
A physical quantity, associated with electrical conductivity, has the ...
SI unit of Specific resistance (ρ) is ohm-metre.
Numerically,the resistivity of a material is the resistance offered by a cube of the material with sides of unit length when a current flows through its opposite faces.
we have, ρ=RA/l
∴ SI unit of ρ=ohm.metre2/metre=ohm-metre
∴ SI unit of ρ=ohm.metre2/metre=ohm-metre
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A physical quantity, associated with electrical conductivity, has the ...
Specific resistance:
The physical quantity associated with electrical conductivity that has the SI unit ohm-meter is specific resistance.
Explanation:
Specific resistance, also known as resistivity, is a measure of how well a material resists the flow of electric current. It is defined as the resistance of a material having unit length and unit cross-sectional area. The SI unit for specific resistance is ohm-meter (Ω·m).
Specific resistance is an intrinsic property of a material and is independent of its dimensions. It depends on factors such as temperature, impurities, and the nature of the material.
Comparison with other options:
a) Specific conductivity: Specific conductivity is the reciprocal of specific resistance. It is a measure of how easily a material conducts electric current. The SI unit for specific conductivity is siemens per meter (S/m), not ohm-meter (Ω·m). Therefore, option 'a' is incorrect.
c) Resistance: Resistance is a measure of how strongly a material opposes the flow of electric current. It is the property of an object or a component to resist the flow of electric current. The SI unit for resistance is ohm (Ω), not ohm-meter (Ω·m). Therefore, option 'c' is incorrect.
d) None of these: Since the correct answer is option 'b' (specific resistance), option 'd' is incorrect.
In summary, the physical quantity associated with electrical conductivity that has the SI unit ohm-meter is specific resistance.
The physical quantity associated with electrical conductivity that has the SI unit ohm-meter is specific resistance.
Explanation:
Specific resistance, also known as resistivity, is a measure of how well a material resists the flow of electric current. It is defined as the resistance of a material having unit length and unit cross-sectional area. The SI unit for specific resistance is ohm-meter (Ω·m).
Specific resistance is an intrinsic property of a material and is independent of its dimensions. It depends on factors such as temperature, impurities, and the nature of the material.
Comparison with other options:
a) Specific conductivity: Specific conductivity is the reciprocal of specific resistance. It is a measure of how easily a material conducts electric current. The SI unit for specific conductivity is siemens per meter (S/m), not ohm-meter (Ω·m). Therefore, option 'a' is incorrect.
c) Resistance: Resistance is a measure of how strongly a material opposes the flow of electric current. It is the property of an object or a component to resist the flow of electric current. The SI unit for resistance is ohm (Ω), not ohm-meter (Ω·m). Therefore, option 'c' is incorrect.
d) None of these: Since the correct answer is option 'b' (specific resistance), option 'd' is incorrect.
In summary, the physical quantity associated with electrical conductivity that has the SI unit ohm-meter is specific resistance.
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A physical quantity, associated with electrical conductivity, has the SI unit ohm-meter. Identify this physical quantity.a)Specific conductivityb)Specific resistancec)Resistanced)None of theseCorrect answer is option 'B'. Can you explain this answer?
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