Resistors - GCSE Physics

This video introduces electrical resistors. These small components allow us to control the current and potential difference in different parts of a circuit.

There are different types of resistors, some have a constant resistance and others have variable resistance. An ordinary resistor has a constant resistance and is represented by a simple rectangle. A variable resistor lets us control its resistance manually. A thermistor's resistance is dependent on the temperature. A light dependent resistor (LDR) is dependent on the light intensity.

An ohmic resistor has a constant resistance if the temperature remains constant.

Thanks for watching,

Lewis

Relevant for GCSE Physics 9-1 in the following exam boards:
AQA (including Trilogy)
Edexcel
OCR A
OCR B
WJEC
CIE (Cambridge International Examinations) IGCSE
Edexcel International IGCSE

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