O-Level Physics Electricity & Magnetism Practical Manual (Paper 3)

Study guide30 Nov 2025, 00:00 ZUpdated 17 Jul 2026

Reviewed by

Chee Wei Jie·Academic Advisor (Physics)

TL;DR
The 2026 SEAB Physics syllabus lists resistance determination, magnetic effect of current, and electromagnetic induction in the Paper 3 practical techniques list (items 16 - 18).
MMO marks depend on clean circuit assembly, accurate meter readings, and safe handling of power supplies.
ACE answers should connect gradients and induced-voltage trends to Ohm’s law, Fleming’s left-hand rule, and Faraday’s law while acknowledging internal resistance, heating, and flux leakage.

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Keep Your Physics Practical Stack On Track

Use our O-Level Physics Experiments hub to find companion drills for every Paper 3 skill before you attempt these walkthroughs.

Need a full Paper 3 overview before this niche manual? Use the O-Level Physics Practical 2026 guide for format, weighting, and exam-day setup first.

1 | What SEAB expects you to demonstrate

Resistance measurements (item 16): Construct series/parallel circuits, record $I$

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Experiment	Core readings	Common pitfalls
Resistance of a circuit	Ammeter current, voltmeter potential difference, wire length/diameter (if resistivity tested).	Loose connections, heating of resistors altering values, voltmeter loading if connected incorrectly.
Magnetic effect of current	Current magnitude, field direction/deflection angle, coil turns.	Using steel (remanent magnetism) instead of soft iron cores, compass parallax, inconsistent current supply.
Electromagnetic induction	Induced voltage/current peaks, frequency of motion, speed of magnet or coil.	Slow, non-uniform motion, failure to reset galvanometer, ignoring polarity changes.

O-Level Physics Electricity & Magnetism Practical Manual (Paper 3)

Keep Your Physics Practical Stack On Track

1 | What SEAB expects you to demonstrate

Want supervised lab practice?

2 | Planning responses examiners reward

3 | MMO discipline for circuit-heavy tasks

4 | PDO & ACE moves to secure full credit

5 | Practice prompts before the practical window

Sources

Keep Your Physics Practical Stack On Track

1 | What SEAB expects you to demonstrate

Want supervised lab practice?

2 | Planning responses examiners reward

3 | MMO discipline for circuit-heavy tasks

4 | PDO & ACE moves to secure full credit

5 | Practice prompts before the practical window

Sources

1 | What SEAB expects you to demonstrate

2 | Planning responses examiners reward

3 | MMO discipline for circuit-heavy tasks

4 | PDO & ACE moves to secure full credit

5 | Practice prompts before the practical window