What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.9.1.1An electric current is a flow of charge carriers• understand that an electric current is a flow of charge carriersSyllabus objective9.1.2The charge on charge carriers is quantised• understand that the charge on charge carriers is quantisedSyllabus objective9.1.3Q = It• recall and use Q = ItSyllabus objective9.1.4Use, for a current-carrying conductor, the expression I = Anvq• use, for a current-carrying conductor, the expression I = Anvq, where n is the number density of charge carriersSyllabus objective