Question

Ohm is the SI unit of:

• A. resistance
• B. capacitance
• C. voltage
• D. current

Answer 1

The correct option is A resistance

Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R. The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega ($\Omega$).
When an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm.