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Physics

Explore the graphs, circuits, electric and magnetic field diagrams, and formulas Hoppy provides for the HKDSE Physics curriculum.

Hoppy Gold Quiz Collection

Choose a topic, then open the printable practice or practise interactively in the Hoppy app.

Moments, Energy and Accelerated Motion

English 10 questions

Practise moments, mechanical energy, power, and uniformly accelerated motion.

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Momentum, Projectiles, Gravitation and Circular Motion

English 10 questions

Practise momentum, projectile motion, gravitational fields, satellite orbits, and circular motion.

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Heat, Temperature and Kinetic Theory

English 10 questions

Practise temperature scales, heat capacity, ideal gases, kinetic theory, and changes of state.

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Physics Graphs

Plot force-and-motion, heat-and-gases, and wave graphs for Physics questions — including velocity–time, displacement–time, temperature–time heating/cooling line graphs, I–V characteristics, and wave snapshots.

Question Variations
Displacement-time motion graph Motion graphs (v–t / s–t)
Temperature-time cooling graph Temperature–time heating/cooling graph
Wave displacement-distance graph Wave snapshot
Gas-law pressure-volume graph Gas-law relationship graph
Features
  • Motion graphs such as velocity–time (v–t), displacement–time (s–t), and acceleration–time (a–t)
  • Temperature–time heating/cooling line graphs with melting and vaporization plateaus
  • Wave snapshots, displacement–distance graphs, and displacement–time graphs
  • Gas-law relationship graphs (p–T, p–V, V–T) and I–V / V–I graphs
  • Labelled points, legends, axis units, guide lines, and multi-series colors
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Electric Circuit

Electric circuit diagrams with batteries, resistors, bulbs, switches, ammeters, voltmeters, and wire connections. Renders series and parallel layouts using explicit nodes and wires.

Supported Components
🔋 Battery
▭ Resistor
💡 Bulb
⏻ Switch
Ⓐ Ammeter
Ⓥ Voltmeter
Question Variations
Series circuit with ammeter Series circuit with ammeter
Circuit with voltmeter Circuit with voltmeter
Features
  • Explicit node coordinates for precise circuit layouts
  • Battery positive side and switch hinge side can be marked
  • Components render between two nodes, with orthogonal layouts recommended
  • Optional labelled external terminals for open connection points
  • Junction dots appear only where more than two connections meet
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Electric and Magnetic Field Diagrams

Charged-particle diagrams for uniform electric and magnetic fields — including mutually perpendicular E and B fields and velocity selectors.

Question Variations
Charged particle entering magnetic field region Magnetic field region
Electron in magnetic field into the page Magnetic field into the page
Electron in crossed electric and magnetic fields Mutually perpendicular E and B fields
Hidden magnetic field Hidden magnetic field
Features
  • Uniform electric fields with arrows or parallel plates
  • Uniform magnetic fields into or out of the page with velocity and magnetic force
  • Mutually perpendicular uniform E and B fields and velocity selectors
  • Optional electric force and magnetic force on charges
  • Charged particles entering a field region
Σ

Physics Formulas

Render Physics equations and notation clearly in questions and options.

Question Variations
Physics formula examples Physics equations
Features
  • Clear rendering of Physics equations in questions and options
  • Fractions, roots, exponents, and Greek letters
  • Vectors, subscripts, and scientific notation
  • Inline and display-style formulas for mobile readability

More physics setup visuals (force and motion, wave motion) are planned.

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