Question

The SI unit of resistance is
A. Newton
B. Ohm
C. watt
D. Joule

Answer 1

Hint The resistance of an object is defined as the ratio of the voltage across to the current. The current is passed through the resistance of the circuit. The SI unit of the resistance is ohm. The ohm is expressed as the volt per ampere. The name is derived from the German name called physicist George ohm.

Complete step by step answer
We know that resistance is a term which is studied about the electric currents. The electric currents contain the two factors called the conductance and the resistance. Resistance is defined as the obstruction that a substance causes to the flow of the electric current. It is the dimension length squared mass per time cubed electric current.
The Resistance is the hindrance offered by an object to the current flowing through the circuit. It is lower by the flow of current and it is higher by the resistance of a certain material.
The electrical resistance of an electrical conductor is inversely proportional to the passage of the electrical current. The electric current is passed through the conductor.
The resistance can be expressed as,
 $R = \dfrac{V}{I} $
Where,
 $V $ be the voltage and $I $ be the current.
Therefore, the SI unit of the resistance is ohm.

Hence from the above options, option B is correct.

Note Ohm is the resistance. It is offered by an object when 1 Volt potential difference is applied across the resistance of the circuit and the one ampere of the current passes through the resistance.