Q3 of 15 Page 426

Write the SI unit of resistivity.

SI unit of resistivity is ohm meter.


As we know




Here ρ is resistivity, R is resistance, l is length, A is the cross-sectional area.


Here unit of resistance is ohm, cross-section area unit is m2; length unit is m.



ρ = ohm.m


So the unit of ρ is ohm.m.


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