Current

Cards (4)

how do the strength of magnetic fields vary
greater current, stronger magnetic field
greater distance from wire, weaker field
what is a solenoid
a wire coiled up into a spiral shape
Why do solenoids have an iron core
it increases its strength as its easier for magnetic field lines to travel through the air
what factors affect the strength of magnetic fields
size of current
length
cross sectional area
number of coils
using a soft iron core