Singapore · SEABQ&A
PhysicsQ&A by dot point
A short Q&A bank for every Singapore Physics syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Atomic and Nuclear Physics
- Define half-life and use it to calculate remaining activity or the number of undecayed nuclei8Q&A pairs
- Describe alpha, beta, and gamma radiation and compare their nature, penetration, and ionising power5Q&A pairs
- Describe the nuclear model of the atom and use proton number, nucleon number, and isotopes4Q&A pairs
- Describe uses of radioactivity, its dangers to living cells, and safe handling and storage5Q&A pairs
Electricity and D.C. Circuits
- Define current, potential difference, and resistance, and apply Ohm's law in calculations5Q&A pairs
- Apply the relationships for electrical power and energy and describe fuses, earthing, and circuit safety6Q&A pairs
- Analyse series and parallel circuits, including combining resistances and sharing current and voltage5Q&A pairs
- Describe positive and negative charge, charging by friction, and the forces between charges5Q&A pairs
Energy, Work and Power
- List the main forms of energy, describe energy transfers, and state the principle of conservation of energy7Q&A pairs
- Apply the relationships for kinetic energy and gravitational potential energy and use energy conservation6Q&A pairs
- Define power, apply power equals work over time, and calculate efficiency as useful output over input4Q&A pairs
- Define work done, apply work equals force times distance, and link work to the transfer of energy4Q&A pairs
Forces and Dynamics
- Find the resultant of forces acting in a line, and describe the effects of friction on motion4Q&A pairs
- State and apply Newton's three laws of motion, including the relationship F equals ma4Q&A pairs
- Define the moment of a force, apply the principle of moments, and state the conditions for equilibrium7Q&A pairs
- Identify common forces such as weight, normal contact force, friction, and tension, and draw free-body diagrams4Q&A pairs
Magnetism and Electromagnetism
- Describe electromagnetic induction and explain the a.c. generator and the transformer4Q&A pairs
- Describe the force on a current-carrying conductor in a magnetic field and explain the d.c. motor4Q&A pairs
- Describe magnetic poles and fields, the laws of magnetic force, and magnetic and non-magnetic materials5Q&A pairs
- Describe the magnetic field of a current in a wire and a solenoid, and how an electromagnet works7Q&A pairs
Mass, Weight, Density and Pressure
- Define density, apply the relationship density equals mass over volume, and describe how to measure it4Q&A pairs
- Describe how a manometer and a mercury barometer measure gas and atmospheric pressure5Q&A pairs
- Distinguish mass from weight, relate weight to gravitational field strength, and explain why weight varies with location6Q&A pairs
- Define pressure, apply pressure equals force over area, and calculate the pressure due to a liquid column5Q&A pairs
Measurement and Kinematics
- Select and use rules, vernier calipers, micrometers, and stopwatches, and reduce errors such as parallax and zero error8Q&A pairs
- Interpret distance-time and velocity-time graphs and describe free fall and the effect of air resistance on a falling body6Q&A pairs
- State the SI base quantities and their units, use standard prefixes, and distinguish scalars from vectors5Q&A pairs
- Define speed, velocity, and acceleration, and calculate them for objects moving in a straight line5Q&A pairs
Thermal Physics
- Describe the kinetic particle model and use it to explain the states of matter and changes of state4Q&A pairs
- Describe melting, boiling, and evaporation, and explain latent heat using the particle model3Q&A pairs
- Explain temperature as a measure of average particle energy and describe how a liquid-in-glass thermometer is calibrated5Q&A pairs
- Explain thermal expansion and apply the specific heat capacity relationship to heating calculations3Q&A pairs
Waves, Light and Sound
- Define wave terms such as amplitude, wavelength, frequency, and period, and apply the wave equation4Q&A pairs
- State the laws of reflection and refraction, define refractive index, and describe total internal reflection5Q&A pairs
- Describe the electromagnetic spectrum and its uses, and explain how sound waves are produced and travel6Q&A pairs
- Describe how a thin converging lens forms images and use ray diagrams and the focal length4Q&A pairs