Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 477 · 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.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
2. 2.What does a thermistor do? (a) senses how hot it is (b) makes things spin (c) makes a beeping sound (d) smooths a wobbly supply
3. 3.What does a buzzer do? (a) smooths a wobbly supply (b) beeps for an alarm (c) blows if current is high (d) is a resistance knob
4. 4.🧩 Which component blows if current is high? (a) capacitor (b) buzzer (c) resistor (d) fuse
5. 5.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
6. 6.🧩 Which component turns a fan or wheels? (a) fuse (b) resistor (c) capacitor (d) motor
7. 7.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
8. 8.What does a transistor do? (a) glows using little power (b) makes things spin (c) blows if current is high (d) boosts a small signal
9. 9.True or false: a motor beeps for an alarm. (a) True (b) False
10. 10.True or false: a buzzer beeps for an alarm. (a) True (b) False
11. 11.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) smooths a wobbly supply (d) glows using little power
12. 12.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) motor (d) thermistor
13. 13.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
14. 14.True or false: a thermistor senses how hot it is. (a) True (b) False
15. 15.What does a diode do? (a) limits the current (b) senses how hot it is (c) stores a little charge (d) lets current go one way
16. 16.True or false: a resistor smooths a wobbly supply. (a) True (b) False
17. 17.True or false: a buzzer limits the current. (a) True (b) False
18. 18.What does a resistor do? (a) makes a beeping sound (b) boosts a small signal (c) beeps for an alarm (d) has coloured bands
19. 19.What does a motor do? (a) is a resistance knob (b) makes things spin (c) stores a little charge (d) makes a beeping sound
20. 20.True or false: a transistor stores a little charge. (a) False (b) True
21. 21.🧩 Which component makes a beeping sound? (a) thermistor (b) LED (c) buzzer (d) LDR
22. 22.True or false: a diode lets current go one way. (a) True (b) False
23. 23.What does a capacitor do? (a) limits the current (b) glows using little power (c) blows if current is high (d) stores a little charge
24. 24.What does a motor do? (a) smooths a wobbly supply (b) lets current go one way (c) turns a fan or wheels (d) senses how hot it is
25. 25.True or false: a transistor senses how hot it is. (a) False (b) True
26. 26.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) boosts a small signal (d) smooths a wobbly supply
27. 27.What does a resistor do? (a) limits the current (b) is a resistance knob (c) boosts a small signal (d) glows using little power
28. 28.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) diode (d) LDR
29. 29.🧩 Which component smooths a wobbly supply? (a) transistor (b) fuse (c) capacitor (d) potentiometer
30. 30.🧩 Which component makes things spin? (a) diode (b) motor (c) resistor (d) LED
31. 31.What does a fuse do? (a) turns a fan or wheels (b) senses how bright it is (c) blows if current is high (d) is a resistance knob
32. 32.🧩 Which component stores a little charge? (a) transistor (b) LED (c) thermistor (d) capacitor
33. 33.True or false: a fuse smooths a wobbly supply. (a) False (b) True
34. 34.🧩 Which component limits the current? (a) buzzer (b) thermistor (c) LED (d) resistor
35. 35.True or false: an LED stores a little charge. (a) True (b) False
36. 36.🧩 Which component boosts a small signal? (a) resistor (b) buzzer (c) capacitor (d) transistor
37. 37.True or false: a fuse turns a fan or wheels. (a) True (b) False
38. 38.What does a buzzer do? (a) makes things spin (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
39. 39.🧩 Which component glows using little power? (a) motor (b) transistor (c) LED (d) thermistor
40. 40.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) LDR (d) diode

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids