A point charge moves with velocity v in a region having both an electric field E and a magnetic field B. The total Lorentz force on the charge q is best written as:

1. The Lorentz force combines the electric force and the magnetic force on a charge. 2. Electric part: $\mathbf{F}_E = q\mathbf{E}$. 3. Magnetic part: $\mathbf{F}_B = q(\mathbf{v} \times \mathbf{B})$. 4. Adding them: $\mathbf{F} = q[\mathbf{E} + \mathbf{v} \times \mathbf{B}]$. _Source: NCERT Class 12 Physics Ch 4 "Moving Charges and Magnetism", p.134_