AQA Physics Electricity Revision Notes
Master AQA Physics Electricity using simple revision notes, key facts and practice questions — all generated by AI for your exam.
Electricity is the flow of electric charge, typically through a conductor. It involves key concepts such as current, voltage, resistance, and power, which are essential for understanding electrical circuits.
Key Concepts
- 1Current (I) is the rate of flow of charge measured in Amperes (A)
- 2Voltage (V) is the electric potential difference measured in Volts (V)
- 3Resistance (R) is the opposition to current flow measured in Ohms (Ω)
- 4Ohm's Law states V = I × R
- 5Power (P) is the rate at which electrical energy is transferred, calculated as P = V × I
Simple Explanation
Electricity is all about how electric charge moves through materials. When charges flow, we call that current, and it needs a push, known as voltage. Resistance is like a barrier that slows down the flow of current. Together, these concepts help us understand how electrical devices work.
Memory Trick
“Remember 'Clever Vultures Resist Power' to recall Current, Voltage, Resistance, and Power.”
Flashcards
What is the unit of current?
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Exam Questions
Describe and explain the relationship between current, voltage, and resistance in a circuit. [6 marks]
6 marksView mark scheme hint▾
Define current, voltage, and resistance; explain Ohm's Law; provide examples of how they interact.
Explain how increasing resistance affects the current in a circuit. [4 marks]
4 marksView mark scheme hint▾
Discuss Ohm's Law and the inverse relationship between current and resistance.
What is meant by electrical power? [2 marks]
2 marksView mark scheme hint▾
Define electrical power and state its formula.
Practice Quiz
What is the unit of electric current?
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