The unit of electrical current is what?

The unit of electrical current is what?

• A. Potential difference
• B. Current
• C. Charge
• D. Inductance

Answer: (B)

The main idea here is linking a physical quantity to its unit. Electric current is the rate at which electric charge flows. Its standard unit is the ampere, defined as one coulomb passing a point each second. The other options name different electrical quantities with their own units: potential difference corresponds to voltage (volts), charge corresponds to coulombs, and inductance corresponds to henries. Among the choices, the one that identifies the quantity whose unit is amperes is the current, making it the best match for this question as stated. Remember, the actual unit name for current is ampere, but this option points to the quantity whose unit you’d use to measure it.

The main idea here is linking a physical quantity to its unit. Electric current is the rate at which electric charge flows. Its standard unit is the ampere, defined as one coulomb passing a point each second. The other options name different electrical quantities with their own units: potential difference corresponds to voltage (volts), charge corresponds to coulombs, and inductance corresponds to henries. Among the choices, the one that identifies the quantity whose unit is amperes is the current, making it the best match for this question as stated. Remember, the actual unit name for current is ampere, but this option points to the quantity whose unit you’d use to measure it.