SPM Physics: AHA! Electronic Circuit Symbols Made Easy

 

Form 5 Physics introduces electronic circuit symbols — a must‑know for SPM. The exam usually shows the symbol first, so students must:

1. Recognise the symbol.

2. Recall the component name.

3. State its function.

Quick memory guide:

• LED → Light output

• LDR → Light sensor

• Thermistor → Temperature sensor

• Relay coil → Electromagnetic switch

• Galvanometer → Detect small current

• Transformer → Change voltage

• Transistor → Amplifier / Switch

• Motor → Mechanical output

Exam tip: Don’t just memorise blindly. Understand the function — that’s how you secure marks in diagram questions.

AHA! Circuit symbols unlock marks. Not by sight, but by INSIGHT!

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