What this topic covers
Electricity has 4 subtopics:
- Current, potential difference and resistance
- Series and parallel circuits
- Domestic uses and safety
- Energy transfers
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GCSE AQA Higher Combined Science Physics · Topic 2 of 8
Electricity – GCSE AQA Higher Combined Science Physics revision notes
Choose a subtopic. Electricity covers Current, potential difference and resistance, Series and parallel circuits, Domestic uses and safety, and Energy transfers in GCSE AQA Higher Combined Science Physics. 21 lessons in 4 subtopics.
Revise Electricity for GCSE AQA Higher Combined Science Physics, including Current, potential difference and resistance and Series and parallel circuits.
21
Lessons
4
Subtopics
Electricity lessons by subtopic
21 lessons, grouped by subtopic.
Current, potential difference and resistance
- Current, Potential Difference and Resistance
- Resistors in Series and Parallel
- Calculating Voltage, Current, and Resistance
- Measuring Resistance and Ohmic Conductors
- Non-Ohmic Components: Lamps and Diodes
- Thermistors, LDRs, and Non-Linearity
- Circuit Symbols and Diagrams
- Electric Charge and Current
Series and parallel circuits
- Series Circuits: Current, PD & Resistance
- Parallel Circuits: Current, PD & Resistance
- Series Circuits: Calculations, Design & Testing
Domestic uses and safety
- Mains Electricity: Dangers and Precautions
- Three-Core Cables and Wire Identification
- AC vs DC Potential Difference
Energy transfers
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Frequently asked questions
What is Electricity?
Electricity covers Current, potential difference and resistance, Series and parallel circuits, Domestic uses and safety, and Energy transfers in GCSE AQA Higher Combined Science Physics. 21 lessons in 4 subtopics.
What are the circuit symbols you need to know?
Key circuit symbols include the battery and cell (long and short lines), resistor (rectangle), variable resistor (rectangle with an arrow through it), open switch (gap in line), lamp (circle with an X inside), motor (circle with M) and power supply (circle with + and - signs). The Circuit Symbols and Diagrams notes cover this in full.
What is potential difference?
Potential difference (V) is the energy transferred per unit charge between two points in a circuit, measured in volts (V). The Current, Potential Difference and Resistance notes cover this in full.
What is the circuit symbol for a variable resistor?
The circuit symbol for a variable resistor is a rectangle with an arrow through it. The Circuit Symbols and Diagrams notes cover this in full.
What is Ohm's law?
Ohm's Law connects potential difference, current and resistance: V = IR. The Current, Potential Difference and Resistance notes cover this in full.
How do you calculate resistance from current and potential difference?
Resistance is calculated with R = V ÷ I, giving ohms when volts are divided by amperes. The Measuring Resistance and Ohmic Conductors notes cover this in full.
What is electric current?
Electric current is the rate of flow of electrical charge through a conductor, measured in amperes (A). The Electric Charge and Current notes cover this in full.
How do you convert milliamps to amps?
To convert milliamps to amps, divide by 1000, because a milliamp (mA) is one thousandth of an amp: 500 mA equals 0.5 A and 250 mA equals 0.25 A. The Calculating Voltage, Current, and Resistance notes cover this in full.
What is the National Grid?
The National Grid is a system of cables and transformers linking power stations to consumers across the country. The National Grid Introduction notes cover this in full.