Current flow in an electrical circuit is caused by ? and opposed by ?.

Current flow in an electrical circuit is caused by ? and opposed by ?.

• A. Inductance / Resistance
• B. Resistance / Power
• C. Voltage / Power
• D. Voltage / Resistance

Answer: (D)

Current flow is driven by a voltage difference, which acts as the push that moves charges through a circuit. How much current flows is determined by Ohm’s law: I = V/R. So, for the same voltage, increasing resistance reduces current, while decreasing resistance increases it. In steady conditions, resistance is the main opposition to current; inductance or other reactive elements can oppose changes in current, but the fundamental driver is voltage and the primary opposition is resistance. Power isn’t what pushes current; it’s the product V×I representing the rate of energy transfer.