question_answer

A proton moving with a constant velocity passes through a zero gravity region without change in velocity. If E and B represent electric and magnetic fields respectively, the region of zero gravity may not have:-

A)  \[E=0,\,B=0\]           

B)  \[E=0,\,B\ne 0\]

C)  \[E\ne 0,\,B=0\]         

D)  \[E\ne 0,\,B\ne 0\]