Write a sentence that explains the importance of electromagnets.

Electromagnets are very important because they are used in different  electrical appliances  to generate different magnetic fields.

Explanation:

It is used in our daily lives in many ways

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.