The electrostatic force $(\vec{F}_1)$ and magnetic force $(\vec{F}_2)$ acting on a charge $q$ moving with velocity $\vec{v}$ can be written as:

• A
  $\vec{F}_1=q \vec{v} \cdot \vec{E}, \vec{F}_2=q(\vec{B} \cdot \vec{v})$
• B
  $\vec{F}_1=q \vec{E}, \vec{F}_2=q(\vec{B} \times \vec{v})$
• C
  $\vec{F}_1=q \vec{E}, \vec{F}_2=q(\vec{v} \times \vec{B})$
• D
  $\vec{F}_1=q \vec{B}, \vec{F}_2=q(\vec{B} \times \vec{v})$