A moving charged particle and an accelerating charged particle are different in terms of their motion and the forces acting on them.
A moving charged particle refers to a charged particle that is in motion, but its velocity remains constant. In other words, it is moving at a constant speed in a straight line. When a charged particle moves in a uniform magnetic field, it experiences a force called the magnetic force. This force acts perpendicular to the velocity of the particle, causing it to move in a circular path. This circular motion is known as uniform circular motion. In this case, the particle's acceleration is directed towards the center of the circular path, but its speed remains constant.
On the other hand, an accelerating charged particle is a charged particle that is experiencing a change in velocity. It means the particle's speed or direction, or both, are changing over time. When a charged particle undergoes acceleration, it experiences a force known as the electromagnetic force. This force is given by the equation F = qE + qv × B, where q is the charge of the particle, E is the electric field, v is the velocity of the particle, and B is the magnetic field. The first term, qE, represents the force due to the electric field, while the second term, qv × B, represents the force due to the magnetic field.
In summary, a moving charged particle refers to a particle with constant velocity, while an accelerating charged particle experiences a change in velocity and is subject to both electric and magnetic forces.