Electric current
Core concepts and learning points for this section:
Syllabus Points
Core
- 4.2.2.1 Know that electric current is related to the flow of charge
- 4.2.2.2 Describe the use of ammeters (analogue and digital) with different ranges
- 4.2.2.3 Describe electrical conduction in metals in terms of the movement of free electrons
- 4.2.2.4 Know the difference between direct current (d.c.) and alternating current (a.c.)
- 4.2.2.5 Know the difference between direct current (d.c.) and alternating current (a.c.)
Supplement
- 4.2.2.6 Define electric current as the charge passing a point per unit time; recall and use the equation Q I = t