GCSE Physics - Components - Symbols | Measurements in Circuits | Resistors (2026/27 exams)

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*** WHAT'S COVERED ***
1. Standard symbols for drawing circuit diagrams.
2. Components for providing and controlling electric power.
* Cell and Battery symbols.
* Open and Closed Switch symbols.
3. Symbols for common electrical components.
* Filament Lamp (bulb).
* Fuse for circuit protection.
* Diode and Light-Emitting Diode (LED).
4. Components used for measurement in circuits.
* Ammeters for measuring current.
* Voltmeters for measuring potential difference.
5. Different types of resistors and their symbols.
* Fixed Resistor and Variable Resistor.
* Light-Dependent Resistor (LDR) and its behaviour with light intensity.
* Thermistor and its behaviour with temperature changes.

*** CHAPTERS ***
0:00 Introduction to Circuit Diagram Symbols
0:23 Circuit Symbols for Power and Control (Cell, Battery, Switch)
0:43 Circuit Symbols for Lamps, Fuses and Diodes (LED)
1:19 How to Measure Current and Potential Difference (Ammeter & Voltmeter)
1:38 Circuit Symbols for Resistors (Fixed & Variable Resistors)
2:07 Understanding the Light-Dependent Resistor (LDR)
2:50 Understanding the Thermistor

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