Is the strength of a magnetic field directly proportional to voltage?

[IamGoat]

I understand current is, however is voltage? As if you increase voltage the current must increase(unless resistance does). However does this mean voltage is 'directly' proportional to magnetic field strength?

 

[static zap]

Things get tricky with magnetic fields ,as you have an inductor , that if things change it may oppose a current in dynamic conditions by generating its own voltage to confuse things. (For inductors we consider current / (and for capacitors we consider voltage -think battery charging))
..Resisting change is like "inertia" in mechanical spring / mass systems..

 

[marconi]

No, in general the magnetic field B is not directly proportional to voltage. A magnetic field arises from and is around moving charge ie a current and not from a potential difference ie a voltage. The higher the current I (that is the greater is the quantity q(charge) x v(charge velocity) the higher is the magnetic field B. Whereas, an electric field is the result of charge alone, whether moving or not, and is in a radial direction relative to it.

Take a look at Ampere's Law for further study.