This checkpoint tests the electrical energy and future energy blocks: circuit basics, series and parallel circuits, Ohm's law, future energy and alternatives, global trends, and the school energy audit.
This checkpoint is cumulative. Strong performance means you can explain and justify ideas across the whole block rather than answer each lesson in isolation.
Circuit basics: elements, symbols, complete circuits, voltage, current and resistance.
Series and parallel circuits: construction, comparison, and behaviour of voltage and current.
Ohm's law investigation: V = IR, data collection, and simple circuit problems.
Future energy and alternative sources: emerging technologies, ethics, and evaluation.
Global energy trends and data: statistics, emissions, intensity, and targets.
School energy audit and depth study: audit methods, star ratings, and investigation preparation.
1. What does voltage measure in a circuit?
2. In a series circuit, what happens to the current at different points?
3. In a parallel circuit, what happens to the total current as more branches are added?
4. Ohm's law states that V = IR. If a resistor has 6 V across it and 2 A flowing through it, what is its resistance?
5. Which circuit symbol represents a resistor?
6. Why might a country invest in battery storage alongside solar farms?
7. What does an Energy Star rating indicate about an appliance?
8. Which factor is most likely to increase global energy demand over the next 30 years?
9. A light bulb does not obey Ohm's law at all temperatures. Why?
10. Which statement best captures the final blocks of this unit?
Compare series and parallel circuits, describing one advantage and one disadvantage of each arrangement.
Describe the behaviour of current and voltage in each, then give a practical advantage and disadvantage.
A circuit contains a 12 V battery and a resistor. The current measured is 0.5 A. Calculate the resistance and explain what would happen to the current if the voltage were doubled while resistance stayed the same.
Use Ohm's law for the calculation, then explain the proportional relationship.
Your school wants to reduce its energy use. Outline a practical energy audit plan that could identify where the most energy is being wasted.
Describe steps of an audit, what data to collect, and how to use the findings to make recommendations.
1: C. Voltage is the potential difference that provides the push for charge to flow around a circuit.
2: C. In a series circuit, there is only one path, so the current is the same at every point.
3: C. Adding parallel branches provides more paths for current, so the total current from the battery increases.
4: A. R = V / I = 6 / 2 = 3 ohms.
5: A. A resistor is represented by a zigzag line in circuit diagrams.
6: B. Battery storage captures surplus solar energy during the day so it can be used when the sun is not shining.
7: B. Energy Star ratings compare the energy efficiency of appliances; more stars mean better efficiency.
8: C. Growing populations and industrial development in countries like India and Africa will drive increased energy demand.
9: B. The resistance of a filament increases significantly as temperature rises, so V/I is not constant.
10: C. The final blocks integrate circuit knowledge, future energy evaluation, and data-driven decision making.
Model answer:
Model answer:
Model answer:
You should now describe circuit elements, compare series and parallel behaviour, and apply Ohm's law.
You should evaluate alternative sources using multiple criteria and evidence.
You should design and justify an energy audit with clear data collection and recommendations.
The unit concludes with a full review and depth study synthesis.