Test
Electric power and energy practice
This 10th-grade practice material focuses on calculating electric power using P = VI, understanding kilowatt-hours, and analyzing electricity bills. Students answer questions on formulas, power ratings, and energy consumption through problem-solving exercises.
By Edform · Physics · Grade 10 · Published Oct 15, 2026 · New
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Questions
- Which equation correctly relates electric power (P), voltage (V), and current (I)?
- A hair dryer operates at 120 V and draws 10 A of current. What is its power rating?
- Which of the following units are commonly used to measure electrical energy?
- A 100 W light bulb is used for 5 hours. How much energy does it use in kilowatt-hours?
- Fill in the blank: The cost of running an appliance depends on its power rating, the time it is used, and the ___ charged per kilowatt-hour.
- Choose the correct word: The unit of electric power is ___.
- Arrange the steps in the correct order to calculate the cost of using an appliance.
- Match each term with its correct definition.
- Sort the following items into 'Power' or 'Energy' units.
- Mark each statement as true or false.
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