AFOQT Practice Test

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

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In which unit is electrical resistance measured?

  1. Watts

  2. Amperes

  3. Ohms

  4. Volts

The correct answer is: Ohms

Electrical resistance is measured in ohms, which is the standard unit of measurement in the International System of Units (SI). The concept of resistance is defined in the context of Ohm's Law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R). This relationship can be expressed with the formula: V = I × R. The unit of resistance, the ohm, represents the amount of resistance that allows one ampere of current to flow when one volt is applied. This makes ohms a critical unit in understanding how electrical circuits operate, as it quantifies how much a material opposes the flow of electric current.

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