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Q.

Unit of specific resistance

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a

Ohm

b

Ohm – meter

c

Ohm/metre

d

Ohm + metre

answer is B.

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Detailed Solution

SI unit of resistivity

Ω - m

$R = ρ \frac{l}{A}$

$ρ = \frac{RA}{l}$

$units$

$R = Ω, A = m^{2} l = m$

$ρ = \frac{Ω m^{2}}{m} = Ω m$

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Unit of specific resistance