What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.20.3.1The direction of the force on a charge moving in a magnetic field• determine the direction of the force on a charge moving in a magnetic fieldSyllabus objective20.3.2F = BQv sin θ• recall and use F = BQv sin θSyllabus objective20.3.3The origin of the Hall voltage and derive and use the expression V H = BI /• understand the origin of the Hall voltage and derive and use the expression V H = BI / (ntq), where t = thicknessSyllabus objective20.3.4The use of a Hall probe to measure magnetic flux density• understand the use of a Hall probe to measure magnetic flux densitySyllabus objective20.3.5The motion of a charged particle moving in a uniform magnetic field• describe the motion of a charged particle moving in a uniform magnetic field perpendicular to the direction of motion of the particleSyllabus objective20.3.6How electric and magnetic fields can be used in velocity selection• explain how electric and magnetic fields can be used in velocity selectionSyllabus objective