A charged particle with some initial velocity is projected in a region where non-zero electric and/or magnetic field(s) are present.
In Column I, information about the existence of electric and/or magnetic field(s) and direction of initial velocity of charged particle are given, while in Column II the probable path of the charged particle is mentioned. Match the entries of Column I with the entries of Column II and select the correct answer from the codes given below.
| Column I | Column II |
| A. `E=0, B!=0, E!= B` and initial velocity is at any angle with `B (theta!=90°)` | P. Straight line |
| B. `E=0, B!=0` and initial velocity is perpendicular to B. | q. Helical path with uniform pitch |
| C. `E!=0, B!=0, E||B` and initial velocity is perpendicular to both. | r. Circular |
| D. `E!=0, B!=0, E` perpendicular to `B and v` perpendicular to both `E and B`. | s. Helical path with non-uniform pitch |
Options:
(a) A-q B-r C-s D-p
(b) A-p B-r C-s D-q
(c) A-q B-r C-p D-s
(d) A-s B-p C-q D-r