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Pushoam
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Homework Statement
Show with an example whether Magnetic Force follows Newton's 3rd Law.
Homework Equations
The Attempt at a Solution
Let's consider the following system at time t.
##\vec B ## due to moving q1 at q2 i.e. ## \vec B_1 ## is along ## \hat y ## direction.
So, the force on the q2 is ## \vec F_{on~q2} = q_2 v B_1 \hat z ##
Taking q2 = q1, it's clear that the strength of magnetic field due to q2 at q1 i.e. B_2 is very small compared to B_1.
So, it's clear that magneto - static force doesn't follow Newton's 3rd Law.This results because both magnetic field due to a moving charge and the magnetic force acting on a moving charge are perpendicular to its velocity.
Is this correct?