# Do magnetic field lines indicate how a mangetic field will act on an “idealized” test magnetic north monopole?

We imagine an electric field and a magnetic field as vector fields.
When we are introduced to a static electric field, we usually picture it as an infinite number of vectors (magnitude,direction) in every point in space that will affect the movement ( or will exert a force) of any charged particle going thorough it.
So we can imagine how a test charge will follow (let's assume that the charged paricle field is negligible with respect to the "main" field) our electric/vector field.
Under this assumption, we usually draw field lines to represent how the field will act on a positive charge.
My question is the following:
When we draw magnetic field lines, are we describing how the magnetic field will act on an "idealized" test magnetic north monopole?

*If there are time derivatives involved, there are some multiplicative factors of $$-1$$ due to the Lorentzian signature of spacetime. For the motion of test charges in static electromagnetic fields these do not arise.