Physics for IGCSE & O level - Magnets And Currents (Section 8 - No. 18)
Which of these factors would affect the strength of a magnetic field produced by a solenoid?
The length of the solenoid
The number of turns of wire in the solenoid
The current flowing through the wire
The material of the core
คำอธิบาย
Number of turns, current, and core material.