Question

What is the consequence of placing a core of a material made up of something other than a soft iron?

• A. The strength of a net magnetic field decreases due to a soft iron core.
• B. The soft iron core is used due to its high value of permeability.
• C. Overall strength of an electromagnet increases due to the soft iron core.
• D. Both b and c are correct

Answer 1

The correct option is D Both b and c are correct

Soft iron core has greater permiability than any other material like hard iron.It means it incfreases magetic field lines pass through it easily.This amplifies the net magnetic strength of an electromagnetic.

Hence, option $\left(d\right)$ is the correct answer.