# HOW TO FIND COORDINATES OF A HELIX FORMED BY THE DEVIATION OF A PARTICLE IN A MAGNETIC FIELD AT A CERTAIN TIME?

Aman Bansal
592 Points
12 years ago

Dear Dhruba,

The force on a current carrying wire is similar to that of a moving charge as expected since a charge carrying wire is a collection of moving charges. A current carrying wire feels a sideways force in the presence of a magnetic field. The Lorentz force on a macroscopic current is often referred to as the Laplace force. Consider a conductor of length l and area of cross section A and has charge q which is due to electric current i .If a conductor is placed in a magnetic field of induction B which makes an angle θ (theta) with the velocity of charges in the conductor which has i current flowing in it. then force exerted due to small particle q is

$\mathbf{F} = q \mathbf{v}\sin(\theta),$

then for n number of charges it has

N = nlA

then force exerted on the body is

$f=\mathbf{F}N=q \mathbf{v}\sin(\theta)(nlA)$

but

nqvA = i

that is

$f=\mathbf{B}il\sin(\theta)$

Best Of luck

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Thanks

Aman Bansal