what happens when the magnetic force of a compass is changed?

Question

:) thx!

Answer 1

This is tough question. Does it change in direction or magnitude? Does a compass has a force?

I guess it does since it is made of a magnetic particles each of which exhibit a magnetic dipole oriented, more or less, in the same direction. Each of them create a magnetic field and the strength of that field is directly proportional t how many of them are oriented in the direction of the total magnetic field.


The magnetic force exhibits itself when an electric charge is moving

F=qv x B
F- force
q - magnitude of a charge
v - velocity of the charge
B - magnetic field strength

x - is a vector cross product.


I think now you have enough information to answer your question.

Answer 2

A compass needle has a weak magnetic field and it unlikely to change, even if it does it will still line up with a strong magnetic field if the pivots are not badly worn.