What the syllabus covers
The DSKP lists these content standards for Electricity:
- 3.1 Current and Potential Difference
- 3.2 Resistance
- 3.3 Electromotive Force (e.m.f.) and Internal Resistance
- 3.4 Electrical Energy and Power
Key formulas in this chapter
No formula sheet is given in the exam, so these must be recalled. Every symbol has an SI unit, keep units in every line of working.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Not provided in the exam paper, recall it.
Experiments in this chapter
Paper 3 (practical) can draw on these DSKP experiments. You can practise the graph and analysis skills from home.
- Compare and contrast ohmic and non-ohmic conductors
- Investigate the factors affecting the resistance of a wire
- Determine the e.m.f. and internal resistance of a dry cell
How this chapter is examined
SPM Physics has three papers: 4531/1, 4531/2 and 4531/3 Paper 1 lasts 1 hour 15 minutes. Paper 2 lasts 2 hours 30 minutes. Paper 3 is a practical test of structured subjective items.
How to study this chapter
Learn the idea first, then practise turning it into a calculation with units. Do a few past-style questions with full working, and use the graph skills for any experiment in Electricity. If one section keeps costing marks, a one-to-one lesson can fix exactly that.
What Electricity covers
Electricity is a Form 5 chapter of SPM Physics (KSSM, code 4531) with 4 content standards. It sits in the "Electric and Electromagnetism" strand of the syllabus.
Master the standards below and you have the whole chapter, every SPM question on this topic is built from them.
The content standards you must master
- 3.1 Current and Potential Difference
- 3.2 Resistance
- 3.3 Electromotive Force (e.m.f.) and Internal Resistance
- 3.4 Electrical Energy and Power
Formulas and how to use them
This chapter uses 8 relationships. None is printed in the exam, the SPM Physics papers carry no formula sheet, so recall each from memory and write the unit on every line of working.
- Q = It, Electric charge
- V = W / Q, Potential difference
- V = IR (R = V / I), Ohm's law
- R = R₁ + R₂ + …, Resistors in series
- 1/R = 1/R₁ + 1/R₂ + …, Resistors in parallel
- ε = IR + Ir = V + Ir, Electromotive force
- E = VIt, Electrical energy
- P = VI = I²R = V²/R, Electrical power
Experiments and Paper 3 skills
The DSKP names these investigations for this chapter. Practise the science-process skills they test, identifying variables, tabulating with units, plotting a best-fit line and reading a gradient:
- Compare and contrast ohmic and non-ohmic conductors
- Investigate the factors affecting the resistance of a wire
- Determine the e.m.f. and internal resistance of a dry cell
How this chapter is examined and studied
In Paper 1 the 4 standards appear as objective questions; in Paper 2 as structured items (define, explain, calculate, describe) and sometimes a Section B/C essay; Paper 3 draws on any experiment above. Study in order: read each standard, write its definitions with units, derive each formula once, then attempt past-style questions with full working.
We never predict which questions will appear.
Source: DSKP KSSM Physics Form 4 and 5 (Versi English), Sijil Pelajaran Malaysia: Format Pentaksiran mulai 2021, Fizik (4531) (Bahagian Pembangunan Kurikulum (BPK), KPM)