ARRL Technician Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the ARRL Technician Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Start Multiple Choice Practice Test
Start Flash Cards

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What reading would an ammeter calibrated in amperes show when measuring a 3000-milliampere current?

  1. 0.3 amperes

  2. 3 amperes

  3. 30 amperes

  4. 300 amperes

The correct answer is: 3 amperes

When measuring current, the unit of amperes (A) is often expressed in milliamperes (mA), where 1 ampere equals 1000 milliamperes. Therefore, to convert milliamperes to amperes, you can divide the number of milliamperes by 1000. In this case, you have a current of 3000 milliamperes. Dividing 3000 by 1000 gives you 3 amperes. Thus, an ammeter calibrated in amperes would show a reading of 3 A when measuring a 3000 mA current. This conversion is fundamental in electrical measurements, ensuring you can accurately interpret the values being measured depending on the unit used.

More Questions Like This