How can magnetic force be reduced?

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i4epdp · Accepted Answer

There are lots of ways to reduce magnetic force on something depending on the context, so it's important to think hard and analyze the situation.
Just as a demonstration let us consider a simple system of one charged object traveling at constant velocity through a uniform magnetic field. The object has a charge of q and is traveling with a velocity of

\bar{v}

. (the bar indicates a vector)
The force experienced by the object due to the magnetic field will be

F_{m a g} = q \bar{v} \times \bar{B} = q v B \sin θ

where

\bar{B}

is the magnetic field through which the object is traveling, and "

\times

" is the cross product.

θ

then is the angle between the magnetic field and the object's velocity.
So according to this equation, it should be easy to see that there are a few different ways we could reduce the magnetic force: decrease the charge of the object, decrease the speed of the object, decrease the strength of the magnetic field through which the object is traveling, or change the angle between the magnetic field and the object's velocity vector such that they are parallel - in other words, cause

\sin θ

to be zero.

How can magnetic force be reduced?

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