Question 7 - Past Year - 1 Mark Questions - Chapter 12 Class 10 - Electricity

Last updated at August 14, 2026 by

 

electrical-resistivity-teachoo.png

SI Unit of resistivity is ohm meter.

 

Explanation.

We know that,

R = ρ (l/A)

Therefore,

ρ = R (A/l)

= ohm × m 2 /m

= ohm × m

 

Therefore, unit of rho is ohm meter.

 

Note: Unit of R is ohm, Unit of area of cross-section is m 2 , unit of length is m

 

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