If the area of a material is $4 m^{2}$ and length $20 m$ , what will be the resistivity of that material when its resistance is $10 Ω$ ?

12 m h o

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20 m h o

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4 m h o

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2 m h o

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Solution

The correct option is D $2 m h o$
Given : $R = 10 Ω$ , $A = 4 m^{2}$ and $l = 20 m$
The resistance of a resistor is given by $R = \frac{ρ l}{A}$
Here, $ρ$ is the resistivity of the material.
Thus, $ρ = \frac{R A}{l} = \frac{10 \times 4}{20} = 2 mho$

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If the area of a material is 4m2 and length 20m, what will be the resistivity of that material when its resistance is 10Ω?

The correct option is D 2 mhoGiven : R=10Ω, A=4m2 and l=20mThe resistance of a resistor is given by R=ρlAHere, ρ is the resistivity of the material.Thus, ρ=RAl=10×420=2 mho

If the area of a material is $4 m^{2}$ and length $20 m$ , what will be the resistivity of that material when its resistance is $10 Ω$ ?

The correct option is D $2 m h o$
Given : $R = 10 Ω$ , $A = 4 m^{2}$ and $l = 20 m$
The resistance of a resistor is given by $R = \frac{ρ l}{A}$
Here, $ρ$ is the resistivity of the material.
Thus, $ρ = \frac{R A}{l} = \frac{10 \times 4}{20} = 2 mho$