Answer:
Two difficulties likely to be faced are;
(1) Very exceedingly high currents and temperatures causes demagnetization
(2) High cost of rare-Earth metals
(b) Steps to overcoming the challenges of using a permanent field magnet in an electric generator include
(1) Use of permanent magnetic materials such as Neodymium, Nd which produces high energy for a given rotation and Dy, Dysprosium which also has good power production but is also able to work at high temperature
(2) Development of nor rear-Earth metals for use in applications that demand less
Explanation:
