Question

Which is the S.I. unit of resistance ?

• A. ampere
• B. mho
• C. ohm
• D. farad

Answer 1

The correct option is C ohm

The electrical resistance of an electrical conductor is the opposition to the passage of an electric current through that conductor. The S.I. unit of electrical resistance is the ohm ($\Omega$).
The resistance $\left(R\right)$ of an object is defined as the ratio of voltage across it $\left(V\right)$ to current through it $\left(I\right)$. That is, $R=\frac{V}{I}$ ohms.