The magnetic field strength of an electromagnet cannot be increased by
A) the amount of current.
B) the type of core.
C) the type of material.
D) the number of coils in the wire.

Question

Quizplus · Accepted Answer

The magnetic field strength of an electromagnet can be increased by adjusting the amount of current flowing through the wire, the type of core material (usually a ferromagnetic material enhances the field), and the number of coils or turns in the wire. The "type of material" mentioned in option C is ambiguous because it does not specify whether it's referring to the core material or the wire material. However, in the context of increasing magnetic field strength, the material of the wire (assuming it's a conductor) does not significantly affect the strength of the magnetic field compared to the other factors listed. The core material, current, and coil turns are directly related to the magnetic field's strength, making C the least relevant to directly increasing magnetic field strength.

The Magnetic Field Strength of an Electromagnet Cannot Be Increased