I know the equation for Lorentz's force:


In class I was told that here, the magnetic field is created by another current-carrying wire, but could it be just caused by a moving point charge?


1 Answer 1


Yes, the only requirement is that there is another current. This can be a current-carrying wire as you said, but also a moving point charge.
A moving point charge is a current, as you can see from the definition of a current: \begin{equation} I = \frac{\Delta q}{\Delta t}. \end{equation} The $q$ here is just some charge, no matter how it arrived there.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.