Physics - Magnetism Question with Solution | TestHub
A particle with charge Q is moving in fields of combination given below. Then match the following and choose most appropriate option.
List - I | List - II |
|---|---|
(P) Uniform only | (1) A trajectory of charge particle may be straight line |
(Q) Uniform only | (2) A trajectory of charge particle may be parabola |
(R) Uniform and uniform parallel to each other | (3) A trajectory of charge particle may be non uniform right circular cylindrical helix |
(S) Uniform and uniform perpendicular to each other | (4) K.E. of charge particle can not be constant. |
Options:
Answer:
Solution:
With only, the trajectory may be a straight line or a parabola, and the kinetic energy changes.
With only, motion parallel to is a straight line.
Parallel and allow straight motion or a helix of changing pitch, with changing kinetic energy.
Perpendicular and allow a straight force-free trajectory.
These correspond to option B.
