Question

A fan with copper winding in its motor consumes less power compared to a similar fan with aluminium winding. Explain.

Answer 1

A copper wire has higher conductance than an aluminium wire. So, a copper wire offer less resistance to the current flow than an aluminium wire. Thus, there is more heat dissipation in an aluminium wire than in a copper wire. This is why a fan with copper winding in its motor consumes less power compared to a similar fan with aluminium winding.