What is the practical unit adopted for measuring electric charges?

The practical unit adopted for measuring electric charges is the coulomb. This unit quantifies the amount of electric charge and it is defined based on the interaction of electrical forces. Specifically, one coulomb is equivalent to the charge transferred by a current of one ampere flowing for one second. In terms of its application, the coulomb allows for the measurement and comparison of electric charges in various contexts, making it essential in fields like electronics and electrical engineering.

The other options serve different purposes in the realm of electricity. The volt measures electric potential or voltage, indicating how much energy per charge is available to move charges through a conductor. The ohm measures electrical resistance, reflecting how much a material opposes the flow of electric current. Lastly, the ampere is the unit of electric current, representing the flow of electric charge through a circuit. While they are all fundamental concepts in electricity, the coulomb is specifically the unit that conveys the measurement of electric charge itself.