Which property determines the current in a resistor when a fixed voltage is applied?

Which property determines the current in a resistor when a fixed voltage is applied?

• A. Capacitance
• B. Inductance
• C. Resistance value
• D. Tolerance

Answer: (C)

Current through a resistor with a fixed voltage is determined by Ohm's law: I = V / R. The resistance value sets how much current flows—higher resistance yields lower current, lower resistance yields higher current for the same voltage. Capacitance deals with energy storage in a capacitor and affects current during charging or at different AC frequencies, not the steady current in a simple resistor with a constant voltage. Inductance influences how quickly current can change and adds impedance in AC or during transient events, but the steady-state current across a resistor under fixed voltage still depends on its resistance. Tolerance describes how much the actual resistance can vary from its nominal value, which means the current could vary within a range, but the factor that determines the current itself is the resistance value.

Current through a resistor with a fixed voltage is determined by Ohm's law: I = V / R. The resistance value sets how much current flows—higher resistance yields lower current, lower resistance yields higher current for the same voltage. Capacitance deals with energy storage in a capacitor and affects current during charging or at different AC frequencies, not the steady current in a simple resistor with a constant voltage. Inductance influences how quickly current can change and adds impedance in AC or during transient events, but the steady-state current across a resistor under fixed voltage still depends on its resistance. Tolerance describes how much the actual resistance can vary from its nominal value, which means the current could vary within a range, but the factor that determines the current itself is the resistance value.