Rotational losses vary as follows with respect to field current.

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3a.png"><img alt="Rotational losses vary as shown in the graph with respect to field current - option a" class="alignnone size-full wp-image-160977" height="186" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3a.png" width="300"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3b.png"><img alt="Rotational losses vary as shown in the graph with respect to field current - option b" class="alignnone size-full wp-image-160978" height="186" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3b.png" width="300"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3c.png"><img alt="Rotational losses vary as shown in the graph with respect to field current - option c" class="alignnone size-full wp-image-160979" height="186" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3c.png" width="300"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3d.png"><img alt="Rotational losses vary as shown in the graph with respect to field current - option d" class="alignnone size-full wp-image-160980" height="186" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-entrance-exams-q3d.png" width="300"/></a>