AdvanceReview
Path to 300

Physics / Topic coverage

Electrostatics

Field/potential + capacitors networks — often conceptual MC + numerical.

Weight mediumIntensity Core · weeklyTrend Falling share300-target 10.4 /100medium
Path to 300

Mark budget for this portion

Full 300 plan →
At ~10.6% of physics weight, this portion should reliably deliver ~11 of your 100 physics marks — treat misses here as rank-droppers.
7.8Floor marks
10.4Target marks
12Stretch marks
10.6%Of subject weight
100Subject target
At a glance

Coverage metrics

25Tagged questions
10.6%Of Physics
3.57Average / year
2021Peak year (7 Q)
7/7Years present
Official · 2026

Syllabus map for this portion

Full Physics syllabus →
Electrostatics + capacitance block of Electricity & Magnetism.

Must cover from syllabus

  • Gauss law three classic cases
  • Dielectric capacitors + energy
  • Dipole PE in uniform field

Gaps / exclusions to watch

No special exclusions flagged — finish the unit list below.

Unit 01

Electricity — Electrostatics and Capacitance

high

Exam focusGauss law simple cases; capacitors with dielectrics; dipole energy.

Syllabus points

  • Coulomb; field and potential; PE of point charges and dipoles in uniform field; field lines
  • Flux; Gauss law applications: infinite wire, infinite sheet, thin spherical shell
  • Capacitance; parallel plate with/without dielectrics; series/parallel; energy in a capacitor

Do / check

  • Choose Gaussian surface from symmetry first
  • Track dielectric κ carefully in energy formulas
2020–2026

Year-wise appearance

Counts of tagged questions for this topic each year.

204
217
223
232
243
253
263

Reading the pattern

  • Electrostatics accounts for ~10.6% of tagged physics questions (2020–2026).
  • Trend signal: falling (early-window avg 4.7/yr vs recent avg 3.0/yr).
  • Appears in 7/7 tagged years; peak 2021 (7 Q), low 2023 (2 Q).
  • Dominant subtopics: Capacitance/Field (25).
  • Question-type mix: Numerical 40.0%, Multi correct 36.0%, Single correct 16.0%, Matching 8.0%.
Internal breakdown

Subtopic coverage

Start with the top subtopics — they usually carry most of this portion’s weight.

  • Capacitance/Field25 · 100%
SubtopicCountShareYears (count)
Capacitance/Field25100%2020·4 2021·7 2022·3 2023·2 2024·3 2025·3 2026·3
Exam form

Type & difficulty mix

Question types

  • Numerical — 10 questions (40%)
  • Multi correct — 9 questions (36%)
  • Single correct — 4 questions (16%)
  • Matching — 2 questions (8%)

Difficulty (heuristic)

  • H — 14 questions
  • M — 11 questions

Use for planning load only — not an official difficulty label.

Focused study

Plan for this portion

Must know

  • Gauss law symmetries
  • Capacitor with dielectrics / series-parallel
  • Energy stored & force on plates

Common traps

  • Confusing E vs V superposition
  • Dielectric insertion with battery vs isolated

Weekly drill checklist

  • 2 field/potential
  • 2 capacitors
  • 1 multi-correct

Prerequisite chain

Coulomb→field/potential→Gauss→capacitors

Often joins with

Current ElectricityMagnetism/EMI/AC
Paper pointers

Sample tagged questions

Use these as deliberate practice targets from past papers.

YearPaperQSubtopicTypeDiff
2020P1Q10Capacitance/FieldMCH
2020P1Q15Capacitance/FieldNUMH
2020P2Q5Capacitance/FieldSCM
2020P2Q15Capacitance/FieldNUMM
2021P1Q6Capacitance/FieldNUMH
2021P1Q7Capacitance/FieldNUMM
Connections

Related mixed joins

Where this topic must connect with another concept in one stem.

Physics2026 · Paper 2 · Q15–Q16linked-numerical

Fluid flow between chambers + changing capacitance

Fluids – level vs time+Electrostatics – Capacitance+Dielectric / liquid between plates

Knowledge bridge

Step 1: from the linked fluid setup, find liquid height in the left chamber at t = 500 s. Step 2: translate that height (or remaining liquid fraction) into the dielectric fill between capacitor plates. Step 3: compute ΔC = (8−n)ε₀ and extract n.

Why it feels hard

Two chapters share one clock variable t; errors in height propagate into capacitance.

What to practise

Practise fluid+capacitor linked numericals where the same h(t) feeds both answers.

Open 2026 year review →
Physics2021 · Paper 1 · Q6–Q9linked-numerical

Capacitance/field linked numerical chain

Electrostatics – Capacitance+Electric field+Linked numericals

Knowledge bridge

Step 1: draw the capacitor/field configuration and label charge/potential. Step 2: solve the first NUM for a base quantity (C, E, V). Step 3: propagate that value through linked asks (energy, force, series/parallel changes).

Why it feels hard

Long electrostatic chains amplify one early algebra mistake.

What to practise

In linked EM stems, verify units of the first answer before continuing.

Open 2021 year review →
Physics

Other portions

MechanicsOpticsThermodynamics/Kinetic TheoryWaves/SHM/SoundMagnetism/EMI/ACModern PhysicsCurrent ElectricityFluid/Properties of Matter
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