66th B.P.S.C. (Pre) (Re-Exam) 2020
‘Ohm-metre’ is unit of :
aResistance
bConductance
cResistivity✓ Correct
dCharge
eNone of the above/More than one of the above
Explanation
Electrical resistivity indicates the ability of a substance to oppose the flow of electric current. Substances with low resistivity allow electric current to pass easily. Its SI unit is ohm-metre ($\Omega \cdot$m). Electrical resistivity: $(\rho) = R \frac{A}{l}$ where—
general-science