Small electric currents are measured in milliampere (mA) and microampere (μA). Which of the following unit conversions is correct?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 1 mA = 10−3 A, 1 μA = 10−6 A
The prefix milli means one-thousandth (10−3) and micro means one-millionth (10−6). So 1 mA is one-thousandth of an ampere and 1 μA is one-millionth of an ampere.