Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 44 · 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 limits the current? (a) transistor (b) thermistor (c) resistor (d) diode
2. 2.What does a transistor do? (a) boosts a small signal (b) senses how bright it is (c) smooths a wobbly supply (d) beeps for an alarm
3. 3.🧩 Which component makes a beeping sound? (a) transistor (b) diode (c) potentiometer (d) buzzer
4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
5. 5.What does a motor do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) limits the current
6. 6.True or false: a fuse blows if current is high. (a) True (b) False
7. 7.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) motor (d) resistor
8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
9. 9.🧩 Which component beeps for an alarm? (a) thermistor (b) potentiometer (c) capacitor (d) buzzer
10. 10.🧩 Which component turns a fan or wheels? (a) transistor (b) motor (c) diode (d) LED
11. 11.🧩 Which component has coloured bands? (a) diode (b) potentiometer (c) resistor (d) buzzer
12. 12.🧩 Which component stores a little charge? (a) resistor (b) buzzer (c) potentiometer (d) capacitor
13. 13.🧩 Which component smooths a wobbly supply? (a) thermistor (b) transistor (c) capacitor (d) resistor
14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
15. 15.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) limits the current (d) stores a little charge
16. 16.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) blows if current is high (d) senses how hot it is
17. 17.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
18. 18.What does a diode do? (a) makes a beeping sound (b) senses how hot it is (c) blows if current is high (d) lets current go one way
19. 19.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) senses how hot it is (d) beeps for an alarm
20. 20.True or false: a buzzer has coloured bands. (a) True (b) False
21. 21.True or false: a buzzer stores a little charge. (a) True (b) False
22. 22.🧩 Which component lets current go one way? (a) fuse (b) diode (c) motor (d) capacitor
23. 23.🧩 Which component senses how bright it is? (a) thermistor (b) diode (c) LDR (d) buzzer
24. 24.🧩 Which component glows using little power? (a) LED (b) capacitor (c) buzzer (d) fuse
25. 25.🧩 Which component boosts a small signal? (a) LDR (b) motor (c) thermistor (d) transistor
26. 26.🧩 Which component makes things spin? (a) LDR (b) transistor (c) motor (d) resistor
27. 27.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) potentiometer (d) diode
28. 28.True or false: a motor limits the current. (a) True (b) False
29. 29.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) is a resistance knob (d) glows using little power
30. 30.🧩 Which component blows if current is high? (a) diode (b) fuse (c) potentiometer (d) buzzer
31. 31.True or false: an LED stores a little charge. (a) False (b) True
32. 32.True or false: an LDR smooths a wobbly supply. (a) True (b) False
33. 33.What does a buzzer do? (a) makes a beeping sound (b) makes things spin (c) has coloured bands (d) stores a little charge
34. 34.What does an LED do? (a) glows using little power (b) makes things spin (c) is a resistance knob (d) blows if current is high
35. 35.What does an LDR do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) beeps for an alarm
36. 36.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
37. 37.True or false: a potentiometer is a resistance knob. (a) True (b) False
38. 38.True or false: a thermistor lets current go one way. (a) True (b) False
39. 39.What does a capacitor do? (a) beeps for an alarm (b) makes a beeping sound (c) glows using little power (d) stores a little charge
40. 40.True or false: a motor glows using little power. (a) False (b) True

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