Opposition to current flow is known as

• A. inductance
• B. conductance
• C. resistance
• D. capacitance

Answer: (C)

Opposition to current flow is resistance. It’s the property that determines how much current a given voltage will push through a conductor, described by Ohm’s law V = I R. For a fixed voltage, higher resistance means lower current. Resistance comes from the material’s resistivity and its dimensions: longer length or smaller cross-sectional area increases resistance, and temperature can also raise resistance for most conductors. A resistor uses this property to limit current and convert electrical energy into heat. Conductance is the reciprocal of resistance, reflecting how easily current can flow. Inductance and capacitance, meanwhile, resist changes in current or voltage (they’re reactive), and their opposition depends on frequency in AC circuits, not a simple static opposition like resistance.