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# The SI unit of resistance is :(A) Newton(B) Ohm(C) Watt(D) Joule

Last updated date: 25th Jul 2024
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Hint Resistance is measured in ohm $\left( \Omega \right)$ . It is so-called after the German physicist Georg Simon Ohm. Mathematically, it is the ratio of the potential difference $\left( V \right)$ applied across the resistor to the current $\left( I \right)$ flowing through it.

Electric current is mainly the flow of electrons through the conductor. The flow of electrons is due to the potential difference at the ends of the conductor. This stream of electrons encounters resistance as soon as it starts moving within the body.
Electric current flowing through the conductor, the potential difference and the resistance of the conductor or wire is correlated as
$R = \dfrac{V}{I}$
The resistance of a resistor is measured in ohm $\left( \Omega \right)$, which is the SI unit.
The resistance of a wire is $1$ ohm, meaning that for a current of $1$ Ampere to flow through the wire, $1$ Volt of potential difference is required. Or, when the potential difference across the ends of the wire is 1 volt, then a current of $1$ Ampere flows through it.
It has been named after the German physicist, Georg Simon Ohm.

Therefore, the correct option is (B) Ohm.