Which of the following components is most likely to have negligible impedance in an electrical circuit?

In an electrical circuit, a wire is designed to conduct electricity with minimal resistance and impedance. Negligible impedance means that the component allows current to flow through it very easily without opposing that flow significantly. A wire typically has very low resistance and reactance, especially in a practical setting, meaning it can be considered as an ideal conductor.

In contrast, a resistor is specifically designed to limit current flow, thus it inherently possesses impedance. A transformer includes inductance, which introduces impedance, especially at alternating current frequencies. A capacitor, depending on the frequency of the AC signal, can also present significant impedance due to its reactance, which varies with frequency. Therefore, the wire stands out as the component most likely to have negligible impedance, making it the right answer.