Resistance is a measure of how much a disturbance can affect flows of energy.

• A. A measure of how much a disturbance can affect flows of energy
• B. The rate of energy transfer
• C. The energy stored in a conductor
• D. The current flowing through a circuit

Answer: (A)

Resistance is the opposition a component offers to the flow of electric energy. It sets how much current can pass for a given disturbance in voltage: higher resistance means less current and more energy is dissipated as heat in the resistor, while lower resistance allows more energy to flow. This idea—that resistance governs how disturbances in voltage or other changes affect the amount and distribution of energy in a circuit—is why the statement describes resistance as a measure of how much a disturbance can affect flows of energy.

The rate of energy transfer is power, not resistance; the energy stored in a conductor refers to energy stored in magnetic or electric fields (or heat in a resistor), not the opposition to flow. The current flowing through a circuit is the actual flow itself, not the property that opposes it.