What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.—D.3.1—Charge in electric fields• Motion of a charged particle in a uniform electric field.Syllabus objective—D.3.2—Charge in magnetic fields• Motion of a charged particle in a uniform magnetic field.Syllabus objective—D.3.3—Crossed electric and magnetic fields• Charged particles can move in perpendicular uniform electric and magnetic fields.Syllabus objective—D.3.4—Magnetic force on charge• Magnetic force on moving charge: F=qvB sinθ.Syllabus objective—D.3.5—Force on current conductor• Force on current-carrying conductor: F=BIL sinθ.Syllabus objective—D.3.6—Force between parallel wires• Force per unit length between parallel wires: F/L=μ0I1I2/(2πr).• Parallel currents attract when currents flow in the same direction.Syllabus objective