4.2.2 — Electric current

Core

• 4.2.2.1 — Know that electric current is related to charge flow
• 4.2.2.2 — Describe the use of analogue and digital ammeters with different ranges
• 4.2.2.3 — Describe electrical conduction in metals in terms of 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 — State that conventional current flows from positive to negative and electron flow is opposite

Supplement

• 4.2.2.6 — Define electric current I = Q/t