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Multiple Choice

What is the unit for current?

Current is the rate of flow of electric charge through a circuit. The unit for this rate is the ampere, abbreviated amp (A). By definition, 1 ampere means 1 coulomb of charge passes a point each second. This quantity is what we measure with an ammeter placed in series in the circuit. Voltage, measured in volts, is the electrical pressure that pushes charges around the circuit, while resistance, measured in ohms, is how much a material resists that flow. Power, measured in watts, is the rate at which energy is transferred. These quantities are related by I = V / R, showing how current, voltage, and resistance interact. So the unit for current is amps.

Current is the rate of flow of electric charge through a circuit. The unit for this rate is the ampere, abbreviated amp (A). By definition, 1 ampere means 1 coulomb of charge passes a point each second. This quantity is what we measure with an ammeter placed in series in the circuit.

Voltage, measured in volts, is the electrical pressure that pushes charges around the circuit, while resistance, measured in ohms, is how much a material resists that flow. Power, measured in watts, is the rate at which energy is transferred. These quantities are related by I = V / R, showing how current, voltage, and resistance interact. So the unit for current is amps.