Which one of the following describes the amount of resistance electricity encounters?

The Ohm (symbol: Ω) is the standard international (SI) unit of electrical resistance. Resistance is the measure of the opposition to the flow of electric current in a circuit. According to Ohm's Law, one ohm is the resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces a current of one ampere. Therefore, "Ohm" is the term that describes the amount of resistance electricity encounters.

B. Ampere: The ampere (A) is the unit of electric current, which measures the rate of flow of electric charge.
C. Volts: The volt (V) is the unit of electric potential difference or voltage, which represents the "pressure" that drives the electric current.
D. Watts: The watt (W) is the unit of power, representing the rate at which electrical energy is transferred or consumed.

1. Bureau International des Poids et Mesures (BIPM). (2019). The International System of Units (SI) (9th ed.). Section 2.3.4, Table 4, p. 137. "The ohm, symbol Ω, is the SI unit of electric resistance." The document also defines the volt, ampere, and watt on the same page.

2. National Institute of Standards and Technology (NIST). (2019). NIST Special Publication 330: The International System of Units (SI). Section 2.2.2, Table 3, p. 10. This publication lists the Ohm (Ω) as the SI derived unit for the quantity of electric resistance.

3. MIT OpenCourseWare. (2007). Physics 8.02: Electricity and Magnetism, Spring 2002. Course Notes, Chapter 4: DC Circuits. Section 4.2, p. 4-3. "The SI unit for resistance is the ohm (Ω)."