CourseCourseConceptConceptDocumentDocument

CAIE IGCSE Physics 3.3.8 Difference Between a Digital and Questions

Practise distinguishing digital signals with two discrete states from analogue signals that vary continuously across a range, using labelled traces.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Describe digital signals as two discrete states and analogue signals as continuously variable, and draw labelled stepped digital and smoothly varying analogue traces.

CAIE IGCSE Physics 3.3.8 Difference Between a Digital and Questions question 1

[Maximum number: 3]

A mobile phone (cell phone) network uses microwaves of frequency 1.9×109 Hz1.9 \times 10^{9} \mathrm{~Hz} to transmit and receive signals.

The speed of microwaves in air is 3.0×108 m/s3.0 \times 10^{8} \mathrm{~m} / \mathrm{s}.

All mobile phone (cell phone) networks use digital signals to communicate with the phone.

Describe, with the aid of a diagram, how a digital signal differs from an analogue signal.

All question bank results loaded