The magnetic force (F) on a charged particle is calculated using the formula: F = qvB sinθ.
For a perpendicular projection, θ = 90°, which means sinθ = 1. Therefore, with constant velocity (v) and magnetic field (B), the force is directly proportional to the charge (q).
The charges of various particles are:
| Particle | Charge (q) |
|---|---|
| Electron | -e |
| Proton | +e |
| He+ | +e |
| Li++ | +2e |
Comparing the charge magnitudes, Li++ has the largest charge magnitude (2e). Consequently, it will experience the greatest magnetic force.
The particle experiencing the maximum magnetic force is Li++.
Correct option: (4) Li++