Which basic electrical unit is used to measure a material's opposition to the flow of electricity?

Which basic electrical unit is used to measure a material's opposition to the flow of electricity?

• A. Volt
• B. Ohm
• C. Ampere
• D. Watt

Answer: (B)

The basic electrical unit used to measure a material's opposition to the flow of electricity is the ohm. The ohm quantifies how much resistance a material provides against the flow of electric current. According to Ohm's Law, resistance (in ohms) is calculated as the voltage (in volts) divided by the current (in amperes). This relationship illustrates that higher resistance results in lower current flow for a given voltage, indicating how effectively electricity can pass through a material. The other units, while related to electrical concepts, do not measure resistance. The volt is the unit of electric potential difference, the ampere measures the flow of electric current, and the watt represents electric power, which is the rate of energy transfer per unit time. Understanding these distinctions is essential for grasping the principles of electricity and its applications in water treatment systems.

The basic electrical unit used to measure a material's opposition to the flow of electricity is the ohm. The ohm quantifies how much resistance a material provides against the flow of electric current. According to Ohm's Law, resistance (in ohms) is calculated as the voltage (in volts) divided by the current (in amperes). This relationship illustrates that higher resistance results in lower current flow for a given voltage, indicating how effectively electricity can pass through a material.

The other units, while related to electrical concepts, do not measure resistance. The volt is the unit of electric potential difference, the ampere measures the flow of electric current, and the watt represents electric power, which is the rate of energy transfer per unit time. Understanding these distinctions is essential for grasping the principles of electricity and its applications in water treatment systems.