In order to produce a magnetic field an electric charge must be

In order to produce a magnetic field an electric charge must be in movement.

Explanation:

A magnetic field is generated by the movement of a charged particle in the space around it, as can be seen in the following equation:    

 (1)   

Where F is the magnetic force, q is the charge of the particle, v is its velocity and is the angle between B and v.    

Therefore, in order to produce a magnetic field, it is necessary for the electric charge to be in movement.

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