AFOQT Practice Test

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What measurement unit is used for resistance in an electric circuit?

  1. Volts

  2. Ohms

  3. Amperes

  4. Watts

The correct answer is: Ohms

The correct answer is Ohms, which is the standard unit for measuring electrical resistance in a circuit. Resistance quantifies how much a material opposes the flow of electric current. The higher the resistance, the less current will flow for a given voltage. Understanding Ohm's Law, which states that Voltage (V) equals Current (I) times Resistance (R), reinforces the significance of Ohms in circuit calculations. This law demonstrates how resistance directly affects current flow when a voltage is applied, making Ohms an essential unit in electrical engineering and circuitry. In contrast, Volts measure the electric potential difference, Amperes denote the flow of electric current, and Watts represent the power used in a circuit. Each of these units plays a crucial role in electrical concepts, but they serve distinct purposes that do not pertain to measuring resistance directly.

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