Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 580 · 40 questions

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

1. 1.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
2. 2.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) diode (d) buzzer
3. 3.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) motor (d) thermistor
4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
5. 5.What does an LED do? (a) glows using little power (b) boosts a small signal (c) limits the current (d) blows if current is high
6. 6.True or false: a transistor boosts a small signal. (a) True (b) False
7. 7.True or false: an LED senses how hot it is. (a) True (b) False
8. 8.What does a potentiometer do? (a) beeps for an alarm (b) blows if current is high (c) boosts a small signal (d) is a resistance knob
9. 9.🧩 Which component boosts a small signal? (a) LDR (b) fuse (c) transistor (d) buzzer
10. 10.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) resistor (d) fuse
11. 11.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
12. 12.🧩 Which component glows using little power? (a) fuse (b) capacitor (c) LED (d) thermistor
13. 13.🧩 Which component limits the current? (a) motor (b) LDR (c) potentiometer (d) resistor
14. 14.What does a diode do? (a) has coloured bands (b) turns a fan or wheels (c) senses how hot it is (d) lets current go one way
15. 15.True or false: a capacitor stores a little charge. (a) True (b) False
16. 16.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) resistor (d) thermistor
17. 17.True or false: a resistor has coloured bands. (a) True (b) False
18. 18.What does a buzzer do? (a) limits the current (b) makes a beeping sound (c) has coloured bands (d) turns a fan or wheels
19. 19.True or false: an LDR has coloured bands. (a) True (b) False
20. 20.🧩 Which component turns a fan or wheels? (a) capacitor (b) fuse (c) motor (d) potentiometer
21. 21.What does a thermistor do? (a) makes a beeping sound (b) stores a little charge (c) senses how hot it is (d) smooths a wobbly supply
22. 22.True or false: a resistor limits the current. (a) True (b) False
23. 23.What does a resistor do? (a) stores a little charge (b) turns a fan or wheels (c) has coloured bands (d) lets current go one way
24. 24.True or false: an LED smooths a wobbly supply. (a) False (b) True
25. 25.True or false: a buzzer turns a fan or wheels. (a) True (b) False
26. 26.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) potentiometer (d) buzzer
27. 27.True or false: a motor stores a little charge. (a) False (b) True
28. 28.True or false: a capacitor turns a fan or wheels. (a) True (b) False
29. 29.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) LED (d) fuse
30. 30.True or false: an LED glows using little power. (a) True (b) False
31. 31.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) lets current go one way (d) smooths a wobbly supply
32. 32.What does a fuse do? (a) blows if current is high (b) limits the current (c) has coloured bands (d) senses how hot it is
33. 33.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) lets current go one way (d) boosts a small signal
34. 34.True or false: a buzzer makes a beeping sound. (a) True (b) False
35. 35.🧩 Which component lets current go one way? (a) transistor (b) potentiometer (c) thermistor (d) diode
36. 36.🧩 Which component smooths a wobbly supply? (a) transistor (b) potentiometer (c) LDR (d) capacitor
37. 37.True or false: a potentiometer lets current go one way. (a) False (b) True
38. 38.True or false: a buzzer beeps for an alarm. (a) False (b) True
39. 39.🧩 Which component beeps for an alarm? (a) thermistor (b) fuse (c) buzzer (d) capacitor
40. 40.What does a motor do? (a) glows using little power (b) makes things spin (c) lets current go one way (d) smooths a wobbly supply

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