Resistance to the flow of electrons is measured in what unit?

• A. Volts
• B. Amperes
• C. Ohms
• D. Watts

Answer: (C)

Resistance to the flow of electrons is measured in ohms. This unit is named after Georg Simon Ohm, a German physicist who formulated Ohm's Law, which describes the relationship between voltage, current, and resistance in electrical circuits. According to this law, resistance is a measure of how much a material opposes the flow of electric current, and it plays a critical role in circuit design and analysis.

When assessing the opposition to electron flow, understanding that resistance can affect the overall performance of electrical systems is important. It influences how much current can pass through a conductor for a given voltage (as per Ohm's Law: Voltage = Current × Resistance). This foundational concept helps technicians and electricians troubleshoot and design circuits effectively.

While volts measure electrical potential, amperes measure current, and watts measure power, ohms specifically quantify resistance, making it the correct unit for this question.