In a telephone circuit with components in series, if the current in the receiver is 0.5 amps and the resistances are known, how is the total voltage of the circuit determined?

The total voltage of a circuit with components in series can be determined using Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R), expressed mathematically as V = I × R. In the scenario provided, you've been given the current flowing through the circuit as 0.5 amps, along with the total resistance of the series components.

When components are connected in series, the total resistance in the circuit is simply the sum of the individual resistances. Once you have that total resistance, multiplying it by the current flowing through the circuit provides the total voltage. This approach is foundational in electrical circuits, as it allows for the calculation of how much voltage is needed to push that specific amount of current through the given resistance.

The other choices, while they include relevant terms or concepts, do not apply directly to the fundamental relationship you need to find the total voltage in a series circuit. For instance, multiplying current by voltage rating does not give you a quantity relevant to finding total voltage based on resistance, nor does dividing voltage by total resistance yield the correct measurement in this context. Additionally, current times frequency does not pertain to voltage calculations in a direct current circuit, as frequency is more relevant in