Question

which of the following electromagnets would have the greatest magnetic field?

Explanation:

Step1: Understand electromagnet strength factors

The strength of an electromagnet depends on the number of wire turns around the core. More turns mean a stronger magnetic field.

Step2: Compare wire turns in each option

Looking at the diagrams (assuming the last option has the most turns around the core), the electromagnet with the maximum number of wire - turns will have the greatest magnetic field.

Answer:

The electromagnet with the most wire turns around the core (the last option in the given diagrams) would have the greatest magnetic field.