<p><span style="font-size:14px"><img alt="" src="https://edupmquestionhelp.s3.ap-south-1.amazonaws.com/hint/uploads/images/16256346751625634675.jpg" style="height:961px; width:800px" /></span></p>

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<p><span style="font-size:14px">In figure 7.35, R<sub>1</sub> to R<sub>10</sub> are directional or non-directional overcurrent relays as the requirement calls for. Which relays will back-up relay R<sub>2&nbsp;</sub>?</span></p>