Which quantity measures resistance?

Which quantity measures resistance?

• A. Voltage
• B. Ohms
• C. Power
• D. Current

Answer: (B)

Resistance is the property that opposes current flow, and the quantity used to express how much resistance exists is measured in ohms. The other options describe different electrical quantities: voltage is the potential difference that drives current, current is the flow of charge, and power is the rate at which energy is transferred. So ohms is the unit that directly measures how much resistance a component has. For example, if a resistor has 5 ohms of resistance, applying 10 volts would produce a current of 2 amperes (I = V/R).

Resistance is the property that opposes current flow, and the quantity used to express how much resistance exists is measured in ohms. The other options describe different electrical quantities: voltage is the potential difference that drives current, current is the flow of charge, and power is the rate at which energy is transferred. So ohms is the unit that directly measures how much resistance a component has. For example, if a resistor has 5 ohms of resistance, applying 10 volts would produce a current of 2 amperes (I = V/R).