Question

plz answer this question​

Answer 1

Answer:

b} electromagnetcould be used to separate copper from iron in a scrap yasd as electromagnet work as a powerfull magnet when the electricity is runed throug it which help it to attract iron from copper as iron is a magnetic object and rest of the copper is lyed below.

Explanation:

c} electromagnet is differ from permanent magnet as electromagnet work as a temporary magnet as it only works when electricity is runned through it but in case of permanent magnet it work always without electricity and electromagnet power can be increased by giving high volt of electric current but in case of permanent this quality is absent.