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Exit to Magnetism & Electromagnetism · G3 and O-Level Physics

Magnetism & Induction Lab

Work through field direction, electromagnet setup, motor-effect force, and induction cases with deterministic diagrams and misconception-focused prompts.

  • SEC G3 Physics 2027
Learning goals
  • Determine magnetic-field direction with a compass or bar magnet
  • Interpret bar-magnet field patterns
  • Draw the magnetic field pattern around a bar magnet and between the poles of two bar magnets
  • Interpret the field pattern around a straight current-carrying wire
  • Draw the magnetic field pattern around a straight current-carrying wire

Interactive stageLive model

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Change one variable at a time and watch the model respond.

Lab setup

Main mode
Level 3
18 turns
2.0 A
Direction and induction controls
Directions
Level 3

Magnetism checkpoint

What to notice:

Prediction target:

      Practice run

      Choose a mode and checkpoint count when you want scoring.

      Run mode
      Try Magnetism Quiz

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      Study lensVisualize magnetic field direction and relative strength instead of memorising isolated facts.12 min activity

      Try this

      Read the arrows first: field direction, current direction, then force or induced current.

      Learn to

      • Visualize magnetic field direction and relative strength instead of memorising isolated facts.
      • Relate current and turns to electromagnet strength and pole reversal.
      • Explain motor effect and induction using direction and change, not vague rules.

      Exam transfer

      • Magnetic field
      • Electromagnets
      • Motor effect

      Governing idea

      A current in a magnetic field experiences F = BIL sin θ. Induced emf follows Faraday–Lenz: emf = −N dΦ/dt.

      Model boundary

      Fields and conductors are idealized and mostly uniform. The diagrams use conventional current and simplify coil resistance and magnetic material behavior.

      Avoid this trap

      Lenz's law says the induced effect opposes the change in flux, not that it always opposes the original magnetic field.

      How to explore

      Read field patterns, build electromagnets, predict motor-effect force, and catch the exact condition for induction.

      Predict the outcome, change one variable at a time, then interpret the result. Completion records participation only and does not award mastery.

      Does this count towards my progress?