Which term describes the restriction of current flow in a circuit?

• A. Voltage
• B. Resistance
• C. Continuity
• D. NEXRAD

Answer: (B)

Resistance describes the restriction of current flow in a circuit. It is the opposition that a material or component offers to the movement of electric charges. With Ohm's law, current equals voltage divided by resistance; for a fixed voltage, higher resistance reduces current, while lower resistance allows more current. This is why a resistor or a component with high resistivity limits how much current can pass, protecting other parts of the circuit. If resistance were zero, current would be maximized by the voltage source; if resistance were infinite, no current would flow. The driving force of current is voltage, not the restriction; continuity refers to a complete path for current, and NEXRAD is a weather radar network, not a circuit term.