Does a magnetic field created by a moving charge act upon the charge itself?

In summary: C_D_E_F_G_H_I_J_K_L_M_N_O_P_Q_R_S_T_U_V_W_X_Y_ZIn summary, the Lorentz force is the force that causes an electric field to cause a moving charge to move in a straight line. The direction of the force is limited by symmetry considerations.
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Let's say that a positive charge is held in position. A negative charge, which is 25cm away, is then attracted to this positive charge. But as the negative charge is moving towards the positive charge, it creates a magnetic field. Would this magnetic field then push the negative charge perpendicular to its velocity? If that is true, then what would be the path of the negative charge? I'm also unsure about the magnitudes of force that would determine whether or not the magnetic field is significant compared to the electric field created by the positive charge.

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i presume u talk about the lorentz force. when a charge moves in a magnetic field it produces a force governed by f=q*(v x b) where b is a uniform mag. field. but y shud a moving charge be affected by this force ?? because moving charge produces its own magnetic field. if this charge has its field along the direction of applied field we have no force which is clear from the cross product.That magnetic field would not affect the charge itself because only the electric field of the charge is felt in a relativistic fashion which is the magnetic field. so if u were sitting on the charge u would never feel the magnetic field effect due the charge itself. but if u had another charge to give the effect of relativity in electric field u might feel the field.The idea can be understood through the two current carrying wires experiment where the opposite currents in these wires make them attractive to each other. magnetic field due to single charge can be understood through lorentz transformation.refer this.

https://www.physicsforums.com/showthread.php?t=361248

correct me if i am wrong.
 
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Hi,

charged bodies can exert a so-called "radiation reaction" on themselves: http://en.wikipedia.org/wiki/Abraham%E2%80%93Lorentz_force

Note that this self-force can only occur when the charged body radiates, for suppose it does not radiate but still experiences a self force, then momentum would not be conserved. The change in momentum that occurs in a charge that exerts a force on itself is always balanced by the momentum of the EM radiation it emits.

The direction of the self-force is also limited by symmetry considerations. For example, in your setup there is cylindrical symmetry about the axis of motion (assuming both charges start at rest). A force perpendicular to the direction of motion would break this symmetry, so it can not occur. (In configurations that do not possesses this symmetry a tangential acceleration is of course possible)

Exactly which field, electric of magnetic, is responsible I do not know. Probably both in the most general case. For a charged body moving in a straight line the discussion in chapter 11 of Griffiths seems to suggest that the electric field is responsible.

I based myself on Griffiths' Introduction to Electrodynamics.


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1. Does a magnetic field affect the motion of a moving charge?

Yes, a magnetic field created by a moving charge can exert a force on the charge and affect its motion. This is known as the Lorentz force.

2. What factors determine the strength of the magnetic field created by a moving charge?

The strength of the magnetic field depends on the speed of the moving charge, the distance from the charge, and the direction of the charge's motion relative to the observer.

3. Can a magnetic field created by a moving charge change the direction of the charge's motion?

Yes, if the charge is moving at an angle relative to the magnetic field, the Lorentz force can cause it to change direction and move in a circular or helical path.

4. How does the magnetic field created by a moving charge affect other nearby charges?

The magnetic field can exert a force on other nearby charges, causing them to experience a change in motion or direction.

5. Is the magnetic field created by a moving charge affected by the presence of other magnetic fields?

Yes, the magnetic field created by a moving charge can interact with other magnetic fields, either enhancing or canceling out their effects depending on their relative directions and strengths.

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