Small quantities of electric currents are measured in milliampere (mA) and microamperes (μA). Which of the following unit conversions is correct?

1mA = 10-6 A, 1μA = 10-3 A 1mA = 10-1 A, 1μA = 10-3 A 1mA = 10-2 A, 1μA = 10-4 A 1mA = 10-3 A, 1μA = 10-6 A

1mA = 10-3 A, 1μA = 10-6 A

Small quantities of current are expressed in milliampere (1 mA = 10–3 A) or in microampere (1 µA = 10–6 A). An instrument called ammeter measures electric current in a circuit.