LEDs (Oxford AQA IGCSE Physics)

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Light-emitting diodes (LEDs) are a type of diode
They illuminate when placed in the correct direction (forward bias) when a current flows in a circuit
Since the LED has a visual response to current, it can be used to indicate the presence of a current in a circuit

LEDs are being used increasingly for all lighting purposes because they are so efficient (they require a very low current)
- They convert the most energy from the electrical store to the light energy store compared to any other type of bulb

Make sure you learn the differences between the symbols for an LDR and an LED

Symbols are sometimes drawn with circles around them (e.g. the LDR). These circles are often optional (although not for meters and bulbs).

to absolutely everything:

the (exam) results speak for themselves:

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