What you’ll learn3 learning objectivesChoose one objective for a focused lesson, or study the complete topic.20.2.1A force might act on a current-carrying conductor placed in a magnetic field• understand that a force might act on a current-carrying conductor placed in a magnetic fieldSyllabus objective20.2.2The equation F = BIL sin θ, with directions as interpreted by Fleming’s• recall and use the equation F = BIL sin θ, with directions as interpreted by Fleming’s left-hand ruleSyllabus objective20.2.3Magnetic flux density as the force acting per unit current per unit length• define magnetic flux density as the force acting per unit current per unit length on a wire placed at right-angles to the magnetic fieldSyllabus objective