Voltage is equal to the current multiplied by which of the following?

Voltage is correctly defined by the relationship ( V = I \times R ), where ( V ) represents voltage, ( I ) is the current, and ( R ) is the resistance or impedance in the circuit. This fundamental concept comes from Ohm's Law, which states that the voltage across a conductor is equal to the product of the current flowing through it and the resistance of the conductor.

In this context, resistance or impedance is crucial as it quantifies how much the flow of electric current is opposed within the circuit. This relationship allows us to determine how much voltage is required to drive a certain amount of current through a resistance.

The other choices introduced in the question do not fit into this fundamental relationship. Capacitance represents a capacitor's ability to store charge but does not relate to the basic calculation of voltage. Power, on the other hand, is defined as the rate at which energy is transferred or converted, and it is calculated using the formula ( P = V \times I ). Current frequency relates to the rate of change of current flow over time and does not directly factor into the voltage-current-resistance relationship present in Ohm's Law.