Harmonics in transformer result in

Explanation

When harmonics are present in a transformer, they can cause an increase in core loss. Core loss is the power that is dissipated in the transformer's core due to hysteresis and eddy current losses. Harmonics cause the magnetic flux in the core to be distorted, which can increase the hysteresis and eddy current losses, leading to an increase in core loss. Harmonics can also cause an increase in I^2R losses in transformers. I^2R losses are the losses that occur due to the resistance of the transformer's windings. When harmonics are present, the current waveform in the transformer's windings can be distorted, which can increase the I^2R losses. In addition to the above effects, harmonics in transformers can also interfere with communication circuits. This is because the harmonics can generate electromagnetic interference (EMI) that can interfere with the operation of communication equipment such as radios, televisions, and computers. Thus this option is correct