Which of the following is the SI unit used to measure electric current?

• A. $\mathrm{Ohm}$
• B. $\mathrm{Coulomb}$
• C. $\mathrm{Volt}$
• D. $\mathrm{Ampere}$

Answer: (D)

Verified step by step guidance

1. Understand that electric current is the flow of electric charge through a conductor.
2. Recall that the SI unit for electric current is defined based on the amount of charge passing through a point per unit time.
3. Know that the unit 'Ampere' (A) measures electric current, representing one coulomb of charge passing through a conductor in one second.
4. Recognize that 'Ohm' is the unit of electrical resistance, 'Coulomb' is the unit of electric charge, and 'Volt' is the unit of electric potential difference.
5. Therefore, the correct SI unit used to measure electric current is the 'Ampere'.