Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 129 · 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.True or false: an LDR senses how bright it is. (a) False (b) True
2. 2.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) motor (d) fuse
3. 3.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) makes things spin (d) senses how hot it is
4. 4.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) resistor (d) transistor
5. 5.True or false: a capacitor stores a little charge. (a) True (b) False
6. 6.True or false: a motor has coloured bands. (a) False (b) True
7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
9. 9.True or false: a capacitor makes a beeping sound. (a) False (b) True
10. 10.True or false: a potentiometer is a resistance knob. (a) False (b) True
11. 11.What does an LED do? (a) makes things spin (b) limits the current (c) makes a beeping sound (d) glows using little power
12. 12.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
13. 13.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) LED (d) resistor
14. 14.🧩 Which component beeps for an alarm? (a) resistor (b) LDR (c) buzzer (d) fuse
15. 15.True or false: a diode turns a fan or wheels. (a) True (b) False
16. 16.🧩 Which component stores a little charge? (a) LED (b) transistor (c) thermistor (d) capacitor
17. 17.True or false: a buzzer glows using little power. (a) True (b) False
18. 18.🧩 Which component makes a beeping sound? (a) diode (b) resistor (c) buzzer (d) capacitor
19. 19.What does a motor do? (a) lets current go one way (b) senses how bright it is (c) limits the current (d) makes things spin
20. 20.True or false: a resistor smooths a wobbly supply. (a) False (b) True
21. 21.True or false: a diode is a resistance knob. (a) True (b) False
22. 22.🧩 Which component is a resistance knob? (a) thermistor (b) LED (c) transistor (d) potentiometer
23. 23.True or false: a fuse has coloured bands. (a) True (b) False
24. 24.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) motor (d) fuse
25. 25.True or false: a transistor senses how bright it is. (a) False (b) True
26. 26.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) potentiometer (d) LDR
27. 27.What does a resistor do? (a) turns a fan or wheels (b) senses how bright it is (c) lets current go one way (d) has coloured bands
28. 28.What does a capacitor do? (a) is a resistance knob (b) limits the current (c) stores a little charge (d) senses how hot it is
29. 29.What does a transistor do? (a) senses how bright it is (b) turns a fan or wheels (c) boosts a small signal (d) makes a beeping sound
30. 30.🧩 Which component turns a fan or wheels? (a) fuse (b) LDR (c) diode (d) motor
31. 31.True or false: a thermistor makes a beeping sound. (a) False (b) True
32. 32.What does a buzzer do? (a) senses how bright it is (b) stores a little charge (c) makes a beeping sound (d) smooths a wobbly supply
33. 33.🧩 Which component blows if current is high? (a) capacitor (b) thermistor (c) fuse (d) diode
34. 34.True or false: a resistor beeps for an alarm. (a) True (b) False
35. 35.True or false: a transistor limits the current. (a) True (b) False
36. 36.🧩 Which component limits the current? (a) buzzer (b) LED (c) resistor (d) thermistor
37. 37.True or false: a buzzer senses how hot it is. (a) False (b) True
38. 38.What does a diode do? (a) lets current go one way (b) smooths a wobbly supply (c) turns a fan or wheels (d) limits the current
39. 39.What does an LDR do? (a) beeps for an alarm (b) senses how bright it is (c) blows if current is high (d) has coloured bands
40. 40.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) senses how hot it is (d) makes things spin

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