Current flowing through a solenoid sets up a magnetic flux. If an iron core is added to the solenoid while the current is maintained at a constant value, the magnetic flux will:
A) remain constant
B) totally collapse
C) decrease in strength
D) increase in strength.

Question

Quizplus · Accepted Answer

Adding an iron core to the solenoid increases the strength of the magnetic field by concentrating the flux lines through the core, so the magnetic flux will increase in strength.

Current Flowing Through a Solenoid Sets Up a Magnetic Flux