Interactive Labs › Physics labs
PPhysicsS2 to S5Electricity
Home electricity lab: energy, the bill and safety
Why is the electricity bill high this month? Choose the appliances in a home, calculate the energy and the cost, and learn to use electricity safely.
LevelS2 to S5 (and IGCSE)
TimeAbout 35 min
You usePower, kWh, tariffs, current
PriceFree: no account
🎯 Aim
To calculate the energy used by household appliances, the monthly bill with block tariffs, and the current and fuse needed for safety.
You will learn to
- Calculate energy in kWh from power and time.
- Calculate a bill with block tariffs.
- Calculate current with I = P ÷ V and choose a fuse.
- Explain electrical safety rules.
🧭 What to do
- Set the number of each appliance and the hours it is used each day.
- Read the energy per month and the bill.
- Find the appliance that uses the most energy on the bar chart.
- Choose a Fuse or circuit breaker and add a kettle and an iron: does the fuse hold?
- Answer the questions with the class data.
- Write your conclusion and download your lab report.
📋 The data
Appliances, power and hours of use in one family’s home.
🧠 Investigate: answer from the data
Type your answer and tap Check. Use 💡 Hint first; open the method only when you are stuck.
➕ Get more from this experiment
📝 Free
Print the worksheet (button above), download the data, and save your report. Teachers can project this page in class.
📦 Premium Lab Pack
1 000 RWF
- Home energy survey worksheet for learners’ own homes
- Electrical safety checklist and bill calculations
- Teacher guide and answer key
- Exam-style questions with marking scheme
👩🏫 For teachers
Use it as a practical when apparatus is missing, as homework, or as a project. Free lesson plans help you plan, teach and assess.
🔗 Related in the subjects