Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 469 · 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.What does a capacitor do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) blows if current is high
2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
3. 3.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
4. 4.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) stores a little charge (d) senses how bright it is
5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
6. 6.🧩 Which component boosts a small signal? (a) resistor (b) motor (c) transistor (d) fuse
7. 7.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) lets current go one way (d) beeps for an alarm
8. 8.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) LDR
9. 9.🧩 Which component limits the current? (a) buzzer (b) thermistor (c) resistor (d) potentiometer
10. 10.🧩 Which component senses how hot it is? (a) LDR (b) capacitor (c) thermistor (d) resistor
11. 11.What does an LDR do? (a) lets current go one way (b) stores a little charge (c) senses how hot it is (d) senses how bright it is
12. 12.What does a buzzer do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes a beeping sound (d) lets current go one way
13. 13.What does a motor do? (a) beeps for an alarm (b) turns a fan or wheels (c) glows using little power (d) boosts a small signal
14. 14.True or false: a buzzer stores a little charge. (a) True (b) False
15. 15.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
16. 16.True or false: a fuse beeps for an alarm. (a) True (b) False
17. 17.🧩 Which component beeps for an alarm? (a) capacitor (b) LDR (c) motor (d) buzzer
18. 18.True or false: a buzzer blows if current is high. (a) False (b) True
19. 19.What does a transistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) boosts a small signal
20. 20.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) stores a little charge (d) senses how hot it is
21. 21.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) resistor (d) transistor
22. 22.What does a capacitor do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) limits the current
23. 23.True or false: an LED has coloured bands. (a) True (b) False
24. 24.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) diode (d) transistor
25. 25.🧩 Which component blows if current is high? (a) thermistor (b) potentiometer (c) LDR (d) fuse
26. 26.🧩 Which component glows using little power? (a) motor (b) diode (c) potentiometer (d) LED
27. 27.🧩 Which component is a resistance knob? (a) LDR (b) diode (c) potentiometer (d) LED
28. 28.What does an LED do? (a) limits the current (b) glows using little power (c) senses how hot it is (d) smooths a wobbly supply
29. 29.True or false: an LED makes a beeping sound. (a) False (b) True
30. 30.True or false: a transistor glows using little power. (a) True (b) False
31. 31.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
33. 33.🧩 Which component senses how bright it is? (a) resistor (b) fuse (c) motor (d) LDR
34. 34.What does a fuse do? (a) senses how bright it is (b) is a resistance knob (c) limits the current (d) blows if current is high
35. 35.True or false: a potentiometer is a resistance knob. (a) True (b) False
36. 36.True or false: an LDR senses how bright it is. (a) False (b) True
37. 37.True or false: a transistor boosts a small signal. (a) False (b) True
38. 38.🧩 Which component makes things spin? (a) LDR (b) motor (c) transistor (d) diode
39. 39.What does a motor do? (a) boosts a small signal (b) makes things spin (c) beeps for an alarm (d) limits the current
40. 40.True or false: a thermistor senses how hot it is. (a) True (b) False

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