Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 552 · 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 component makes a beeping sound? (a) transistor (b) buzzer (c) fuse (d) diode
2. 2.What does a motor do? (a) stores a little charge (b) boosts a small signal (c) makes things spin (d) blows if current is high
3. 3.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) transistor (d) motor
4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
5. 5.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
6. 6.What does a resistor do? (a) turns a fan or wheels (b) blows if current is high (c) glows using little power (d) limits the current
7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
8. 8.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
10. 10.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) diode (d) motor
11. 11.True or false: a resistor senses how bright it is. (a) False (b) True
12. 12.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) stores a little charge (d) smooths a wobbly supply
13. 13.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) LDR (d) capacitor
14. 14.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LDR (d) potentiometer
15. 15.True or false: an LED is a resistance knob. (a) True (b) False
16. 16.True or false: a capacitor has coloured bands. (a) True (b) False
17. 17.True or false: a motor makes things spin. (a) False (b) True
18. 18.What does a capacitor do? (a) stores a little charge (b) senses how bright it is (c) has coloured bands (d) lets current go one way
19. 19.What does an LDR do? (a) senses how bright it is (b) turns a fan or wheels (c) limits the current (d) has coloured bands
20. 20.What does a diode do? (a) boosts a small signal (b) has coloured bands (c) lets current go one way (d) beeps for an alarm
21. 21.🧩 Which component makes things spin? (a) LED (b) fuse (c) motor (d) transistor
22. 22.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) resistor (d) diode
23. 23.What does a transistor do? (a) glows using little power (b) stores a little charge (c) boosts a small signal (d) blows if current is high
24. 24.True or false: a potentiometer has coloured bands. (a) True (b) False
25. 25.True or false: a transistor lets current go one way. (a) True (b) False
26. 26.What does a buzzer do? (a) lets current go one way (b) turns a fan or wheels (c) glows using little power (d) beeps for an alarm
27. 27.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) turns a fan or wheels (d) glows using little power
28. 28.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) thermistor (d) fuse
29. 29.What does an LED do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) beeps for an alarm
30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
31. 31.True or false: an LED glows using little power. (a) False (b) True
32. 32.🧩 Which component has coloured bands? (a) thermistor (b) capacitor (c) transistor (d) resistor
33. 33.What does a buzzer do? (a) makes things spin (b) has coloured bands (c) makes a beeping sound (d) boosts a small signal
34. 34.True or false: a buzzer makes a beeping sound. (a) False (b) True
35. 35.What does a motor do? (a) is a resistance knob (b) limits the current (c) has coloured bands (d) turns a fan or wheels
36. 36.🧩 Which component glows using little power? (a) buzzer (b) LED (c) transistor (d) thermistor
37. 37.True or false: a buzzer beeps for an alarm. (a) False (b) True
38. 38.True or false: a diode turns a fan or wheels. (a) True (b) False
39. 39.What does a potentiometer do? (a) senses how hot it is (b) glows using little power (c) stores a little charge (d) is a resistance knob
40. 40.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) capacitor (d) potentiometer

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