Core losses of a transformer as a function of frequency is best approximated by which of the below characteristics?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13a.png"><img alt="The core losses of a transformer as a function of frequency - option a" class="alignnone size-full wp-image-161188" height="217" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13a.png" width="300"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13b.png"><img alt="The core losses of a transformer as a function of frequency - option b" class="alignnone size-full wp-image-161189" height="235" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13b.png" width="300"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13c.png"><img alt="The core losses of a transformer as a function of frequency - option c" class="alignnone size-full wp-image-161190" height="209" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13c.png" width="300"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13d.png"><img alt="The core losses of a transformer as a function of frequency - option d" class="alignnone size-full wp-image-161191" height="205" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-transformer-losses-efficiency-q13d.png" width="177"/></a>