CAIE IGCSE Physics 4.5.3.4 Qualitative Variation of the Strength Questions

Learn how magnetic field strength varies with distance and position around current-carrying conductors.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • compare magnetic field strength at different distances from a current-carrying wire
  • identify where the magnetic field is strongest around a straight conductor and solenoid
  • interpret field-line spacing and position to describe field strength distribution

CAIE IGCSE Physics 4.5.3.4 Qualitative Variation of the Strength Questions question 1

[Maximum number: 1]

Fig. 10.1 shows a wire that carries a current into the page. The circles on Fig. 10.1 show the pattern of the magnetic field around the wire.

Fig. 10.1

Fig. 10.1

State why the spacing of the circles increases as the distance from the wire increases.

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