Question

A moving charge produces.
A. no field.
B. a magnetic field.
C. small electric field.
D. none of these.

Answer 1

Hint: Electrons have only an electric field, and it is because only the electrons movement through space relative to the observer that generates a magnetic field. We know that a moving electric field creates a magnetic field, and a moving charge also creates a magnetic field.

Complete answer:
A stationary charge can produce only electric fields whereas a moving charge can produce both electric as well as magnetic fields.
Hence it is also the method for production of E.M waves.
Therefore a moving charge will produce a small electric field.

The correct option is C.
 Option B is also correct as moving charge also produces magnetic fields.

Additional information:
 All electric charges involve spin. As long as the orientations of these spin planes are random they cancel each other and produce no macroscopic magnetic field. A plain iron bar is an example of an iron object where the spin planes of electron orbitals around iron nuclei are randomly oriented. The same object can be magnetized forcing these spin planes to permanently become closer to parallel transforming the iron bar into a bar magnet.
The same appears to be true for electrons moving or pushing each other in an electric current. The voltage forcing the charges into a current appears to align charge spin planes to become parallel, producing what we have come to call a magnetic field.

 Note:
A very interesting fact is that magnetic fields generated by moving charges are actually just electric fields under the effects of special relativity. The magnetic field is there as a correction to the electric field because the lightspeed is, in fact, the speed at which the electric field is able to propagate and ensures changes to the field is felt at some point after some time.