Question

question 18 of 20
how would replacing the aluminum core of an electromagnet with an iron core affect the electromagnet?
a. it would become weaker.
b. its strength would vary randomly.
c. it would become stronger.
d. its strength would stay the same.

Explanation:

Iron is a ferromagnetic material which can be strongly magnetized. Aluminum is not ferromagnetic. When the core of an electromagnet is changed from non - ferromagnetic aluminum to ferromagnetic iron, the iron core can be magnetized by the magnetic field of the electromagnet's coil, enhancing the overall magnetic field of the electromagnet.

Answer:

C. It would become stronger.