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CAIE IGCSE Physics 4.2.2.4 Difference Between Direct Current Questions

Distinguish direct and alternating current in CAIE IGCSE Physics by tracking whether charge flow reverses direction and interpreting the signs shown on time graphs.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Describe direct current as flow in one direction and alternating current as flow that repeatedly reverses direction; a changing magnitude alone does not make current alternating.
  • Classify current-time or supply voltage-time graphs using changes of sign, rather than assuming every varying graph is alternating.

CAIE IGCSE Physics 4.2.2.4 Difference Between Direct Current Questions question 1

[Maximum number: 1]

Which graph of voltage against time shows an a.c. voltage?

A
Figure for Question CAIE IGCSE Physics 4.2.2.4 Difference Between Direct Current Questions question 1 — CAIE IGCSE Physics — Option A
B
Figure for Question CAIE IGCSE Physics 4.2.2.4 Difference Between Direct Current Questions question 1 — CAIE IGCSE Physics — Option B
C
Figure for Question CAIE IGCSE Physics 4.2.2.4 Difference Between Direct Current Questions question 1 — CAIE IGCSE Physics — Option C
D
Figure for Question CAIE IGCSE Physics 4.2.2.4 Difference Between Direct Current Questions question 1 — CAIE IGCSE Physics — Option D
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