Which of the following is NOT accurate regarding harmonics?

Harmonic distortion indeed affects both current and voltage waveforms. The presence of harmonic currents in a system can cause distortion in the voltage shape as it interacts with the system's impedance. As a result, stating that harmonic distortion only affects voltage waveforms is not accurate.

In practical terms, harmonic distortion results from the non-linear operation of electrical devices, such as rectifiers and inverters, which generate harmonic currents. These currents can cause the voltage waveform to distort, leading to various issues, including overheating of equipment, power quality problems, and increased losses in the distribution system.

Recognizing that harmonic distortion impacts both voltage and current waveforms is critical for assessing electrical system performance and ensuring that corrective measures, such as filtering or power factor correction, are effectively implemented to maintain power quality.