What is the unit of measurement for resistance?

Resistance is measured in ohms, which is the correct answer in this context. The concept of resistance refers to the opposition that a substance offers to the flow of electric current. According to Ohm's Law, resistance (R) is defined as the ratio of voltage (V) across a conductor to the current (I) flowing through it, mathematically represented as R = V/I.

Ohms are the standard unit used to quantify this opposition to current flow, which allows technicians to calculate and analyze circuits effectively. Understanding this unit is critical for anyone working in electronic security, as it helps in designing systems that operate safely and efficiently under various conditions.

The other units mentioned, such as amps, volts, and watts, measure different electrical properties. Amps measure the flow of electric current, volts measure electrical potential or voltage, and watts measure power (the rate at which energy is used or produced). Therefore, familiarity with ohms and other electrical units is essential for a well-rounded understanding of electrical systems.