Which of the following particle will experience maximum magnetic force (magnitude) when projected with same velocity perpendicular to the magnetic field? Choose the correct answer from the options given below.

$Li^{++}$

The correct answer is Option (4) → $Li^{++}$

According to Lorent'z force,

$F=qvB$

$⇒F∝q$

∴ The particle with greatest charge will experience the greatest magnetic force.

Thus, $Li^{++}$ experiences the maximum magnetic force.