In a simple circuit, which quantity predominantly controls the current level in relation to resistance and voltage?

In a simple circuit, which quantity predominantly controls the current level in relation to resistance and voltage?

• A. Current
• B. Capacitance
• C. Voltage
• D. Resistance

Answer: (C)

In a simple circuit, current follows Ohm’s law: I = V / R. The voltage provides the driving force that pushes charges through the resistance. If resistance stays the same, raising the voltage increases the current proportionally; if voltage is fixed, increasing resistance lowers the current. Capacitance doesn’t set the steady current in a basic DC resistive loop—it mainly affects transient behavior when charging or discharging, and in steady state a capacitor doesn’t pass DC current. So the voltage source predominantly controls the current level for a given resistance.

In a simple circuit, current follows Ohm’s law: I = V / R. The voltage provides the driving force that pushes charges through the resistance. If resistance stays the same, raising the voltage increases the current proportionally; if voltage is fixed, increasing resistance lowers the current. Capacitance doesn’t set the steady current in a basic DC resistive loop—it mainly affects transient behavior when charging or discharging, and in steady state a capacitor doesn’t pass DC current. So the voltage source predominantly controls the current level for a given resistance.