Trace wind energy into electrical output
Use moving air to turn a turbine and generator while evaluating variable supply and site conditions.
Section 1.7.3 · Energy resources
Exam scope and assessment notes
Core and Extended · Physics 0972, 2026–2028, section 1.7.3. Resource mechanisms, five comparison factors and qualitative efficiency are Core. Solar origins and exceptions, fusion in the Sun and electricity research, and numerical energy and power efficiencies are Supplement. Written practice is self-checked. Human subject-teacher review, supervised practical experience and cumulative assessment remain pending. Resource comparisons need the supplied site and task evidence; these are teaching models, not a project recommendation or a claim of measured output. Cambridge states that IGCSE 0972 has the same subject content as IGCSE 0625, with 9–1 grading. This StudyForA pathway maps the 2026–2028 syllabus only. This 9–1 graded qualification is available only in a limited number of administrative zones. Confirm that your centre can enter you for this code and exam series with Cambridge International. Cambridge has published a separate syllabus for 2029. StudyForA has not reconciled that version yet; this page supports exams in 2026, 2027 and 2028 only.
Before you begin
- Identify source stores and transfer pathways.
- Distinguish a rotating turbine from a generator that transfers energy electrically.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which immediate store is associated with moving wind?
What you will learn
- Describe wind-turbine and generator roles.
- Compare weather variability, site scale and environmental effects.
Moving air supplies the mechanical drive
Wind has kinetic energy. Moving air turns turbine blades; the rotating turbine drives a generator that supplies electrical transfer. A boiler is not needed in this stated route. Not all air kinetic energy becomes useful electricity, and the air leaving a working turbine still moves; do not describe the whole wind as stopped by ideal conversion.
Wind is associated largely with uneven solar heating of Earth's surface and air. The Extended origins lesson traces that link. The local turbine uses the moving air as its immediate input, not radiation landing on a photovoltaic cell, so shared solar origins do not make wind and solar-cell hardware the same.
A resource can be renewable and variable
Wind is renewable, but strength and direction vary. Generation is not guaranteed at every moment or at every location; the operating design has conditions and limits. Suitable exposed sites, transmission and equipment maintenance affect availability and reliability. A larger installation can increase potential output scale without removing weather variability.
Operation does not need fuel combustion at the turbine, but manufacture, construction, land or sea use, visual effects, noise and wildlife interactions can matter. Compare a specific site's evidence and demand pattern. Storage, network connections or other supplies can support reliability when supplied, but a renewable label does not prove those systems are present.
Pause and explain
Does doubling the number of turbines guarantee electricity when no usable wind is present?
Worked example
Trace energy from moving air through a turbine and generator.
Show the worked solution
- Air supplies a kinetic-energy input.
- The turbine rotates under the wind's action.
- The generator supplies electrical transfer from that mechanical drive.
Answer Wind kinetic energy → turbine rotation → generator electrical output.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Trace moving air through the turbine to the generator output.
Give me a hint
Start with air motion and distinguish rotation from electrical conversion.
Compare my reasoning
- Wind supplies kinetic energy.
- Blades and turbine rotate.
- The generator supplies electrical output from the drive.
Kinetic air → turbine → generator.
Look for these in your work
- Name the immediate source.
- Keep component roles distinct.
A site has variable winds and a larger planned turbine group but no supplied storage. What does greater scale establish and what remains unproven?
Give me a hint
Separate potential output scale from the timing of usable input.
Compare my reasoning
- More suitable machines can increase potential output scale.
- Wind availability remains variable.
- Continuous demand coverage and storage cannot be inferred from turbine count alone.
Potential scale can increase; continuous reliable supply is not established.
Look for these in your work
- Use the supplied weather evidence.
- Do not invent balancing equipment.
A wind scheme claims no environmental effects because it burns no fuel at the turbines. Give two factors still relevant and a site condition.
Give me a hint
Consider construction and local interactions as well as resource availability.
Compare my reasoning
- Manufacture or construction has impacts.
- Noise, visual effects or wildlife interactions may need review.
- The site needs suitable wind and transmission arrangements for the intended task.
Construction and local impacts remain; suitable wind and infrastructure are needed.
Look for these in your work
- Preserve the valid no-combustion feature.
- Assess the actual site and task.
Common mistakes
- Wind input is not a chemical boiler source.
- Renewable does not mean constant local wind.
- Do not invent storage or a network connection.
What can you explain now?
Does a bigger wind installation remove the variability of local weather?
Compare with the explanation
No.
Output scale and the wind's availability pattern are different factors.
After trying it yourself, choose your next review. This is your self-assessment.
Your review choice appears on Today. Sign in to sync it across devices.
Make it stick
Trace wind generation and compare renewability, local availability, scale, reliability and environmental effects.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.