Multiple choice general knowledge science & technology Formula for Magnetic force acting on a charge q moving with velocity v F = q v B Cos ? F = q v B sin ? F = q v B cosin ? F = q v sin ? Reveal answer Fill a bubble to check yourself B Correct answer Explanation The magnetic force on a moving charge is given by F = q(v × B), whose magnitude is F = qvB sinθ where θ is the angle between velocity and magnetic field. Option B correctly shows the sine relationship.