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CIE iGCSE Physics 4.2.2 Current Study Notes

CIE iGCSE Physics 4.2.2 Current Study Notes -2025-2028 Syllabus

CIE iGCSE Physics 4.2.2 Current Study Notes – New Syllabus

CIE iGCSE Physics 4.2.2 Current Study Notes at  IITian Academy  focus on  specific topic and type of questions asked in actual exam. Study Notes focus on CIE iGCSE Physics syllabus with Candidates should be able to:

Core: –

  1. Know that electric current is related to the flow of charge
  2. Describe the use of ammeters (analogue and digital) with different ranges
  3. Describe electrical conduction in metals in terms of the movement of free electrons
  4. Know the difference between direct current (d.c.) and alternating current (a.c.)

Supplement: –

5 . Define electric current as the charge passing a point per unit time; recall and use the equation \(I=\frac{Q}{t}\)
6 State that conventional current is from positive to negative and that the flow of free electrons is from negative to positive

CIE iGCSE  Physics Study Notes- All Topics

4.2.2.1 Know that electric current is related to the flow of charge

4.2.2.1 

Know that electric current is related to the flow of charge

Electric Current and the Flow of Charge

Electric current is the movement of electric charge.

This charge comes from electrons moving through a conductor (like a wire). More charge movement = more current.

Why Does Electric Current Flow?

For current to flow, there must be:

  • A Power Source (Battery/Power Supply) – Provides voltage to push charges.
  • A Closed Circuit – If the path is broken, current stops.
  • A Conductor (like copper wire) – Allows charge to move easily.

How Current Works?

  • Voltage creates a potential difference, giving electrons a reason to flow.
  • Conductors provide free electrons to move under voltage.
  • Electrons carry current (each has a charge of 1.6 × 10⁻¹⁹ C).

More voltage = stronger push = more current flow.

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