IGCSE Physics: Current and Magnetic Fields | Magnetism & Electromagnetism | Unit 7 | L3

This lesson covers spec points 7.8 and 7.10P (Physics only) of the Edexcel Modular IGCSE Physics specification — the magnetic field patterns
produced by current-carrying conductors including a straight wire, a flat coil and a solenoid,
and the factors that affect field strength.

PowerPoint includes:
• Retrieval starter reviewing field patterns from L1 and L2
• Direct Instruction (I Do) — the link between current and magnetism established; field
pattern around a straight wire introduced (end-on and side view); the right-hand grip rule
explained for current direction; factors affecting field strength listed (current size, number
of turns, iron core); flat coil field pattern built from the straight wire case; solenoid
introduced as a series of coils with a near-uniform internal field; N and S pole identification
from current direction demonstrated
• Guided Practice (We Do) — three annotation tasks using the embedded diagrams: add field
lines and direction arrows to a straight wire; label N and S poles on a flat coil; complete
the external field of a solenoid and label poles
• Check for Understanding — 3 MCQs on field direction, pole labelling and factors affecting
strength
• Independent Practice (You Do) — activity sheet with exam-style questions
• Review and Reflect — exit ticket on how to increase solenoid field strength

Activity Sheet includes:
• 3 embedded physics diagrams (straight wire end-on, flat coil, solenoid) for student
annotation — students add field lines, current direction indicators and N/S pole labels
• 10 questions (20 marks) focused on explanation and application rather than simple
description — why is the field stronger close to the wire? What changes if the current
doubles? Why is the solenoid’s internal field approximately uniform?
• Stretch question asking students to suggest three independent changes that would maximise
the field strength of a solenoid
• Physics-only footer on all pages
• Full mark scheme for teacher use