Which quantity is measured in amperes?

Which quantity is measured in amperes?

• A. Voltage
• B. Resistance
• C. Power
• D. Current

Answer: (D)

Current is the flow of electric charges through a conductor. The ampere is the unit that measures how much charge passes a point each second, so if one coulomb of charge moves past a point every second, that’s one ampere. This is different from voltage, which is the potential energy per unit charge and is measured in volts; and from resistance, which tells how much a material resists the flow and is measured in ohms. Power, measured in watts, is the rate at which energy is transferred and is related to current by P = VI or I^2R. To measure current, you use an ammeter connected in series with the element, so it reads the actual flow of charge passing through.

Current is the flow of electric charges through a conductor. The ampere is the unit that measures how much charge passes a point each second, so if one coulomb of charge moves past a point every second, that’s one ampere. This is different from voltage, which is the potential energy per unit charge and is measured in volts; and from resistance, which tells how much a material resists the flow and is measured in ohms. Power, measured in watts, is the rate at which energy is transferred and is related to current by P = VI or I^2R. To measure current, you use an ammeter connected in series with the element, so it reads the actual flow of charge passing through.