Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 416 · 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.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
2. 2.What does a potentiometer do? (a) is a resistance knob (b) beeps for an alarm (c) has coloured bands (d) turns a fan or wheels
3. 3.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
4. 4.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) boosts a small signal (d) senses how bright it is
5. 5.What does a thermistor do? (a) senses how bright it is (b) boosts a small signal (c) beeps for an alarm (d) senses how hot it is
6. 6.🧩 Which component senses how hot it is? (a) transistor (b) resistor (c) potentiometer (d) thermistor
7. 7.True or false: a motor blows if current is high. (a) True (b) False
8. 8.🧩 Which component glows using little power? (a) fuse (b) LED (c) transistor (d) resistor
9. 9.What does a resistor do? (a) limits the current (b) boosts a small signal (c) is a resistance knob (d) beeps for an alarm
10. 10.True or false: a transistor boosts a small signal. (a) True (b) False
11. 11.🧩 Which component makes things spin? (a) motor (b) LDR (c) capacitor (d) fuse
12. 12.True or false: an LDR stores a little charge. (a) False (b) True
13. 13.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
14. 14.What does a capacitor do? (a) makes things spin (b) beeps for an alarm (c) stores a little charge (d) boosts a small signal
15. 15.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) senses how hot it is (d) is a resistance knob
16. 16.True or false: a potentiometer is a resistance knob. (a) False (b) True
17. 17.What does an LED do? (a) limits the current (b) has coloured bands (c) glows using little power (d) boosts a small signal
18. 18.What does a diode do? (a) lets current go one way (b) beeps for an alarm (c) boosts a small signal (d) senses how hot it is
19. 19.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
20. 20.🧩 Which component blows if current is high? (a) LED (b) LDR (c) capacitor (d) fuse
21. 21.True or false: a thermistor limits the current. (a) False (b) True
22. 22.True or false: an LED stores a little charge. (a) False (b) True
23. 23.What does a fuse do? (a) turns a fan or wheels (b) blows if current is high (c) has coloured bands (d) smooths a wobbly supply
24. 24.True or false: a resistor has coloured bands. (a) False (b) True
25. 25.True or false: a resistor beeps for an alarm. (a) False (b) True
26. 26.What does a transistor do? (a) turns a fan or wheels (b) glows using little power (c) boosts a small signal (d) lets current go one way
27. 27.True or false: a resistor limits the current. (a) False (b) True
28. 28.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
29. 29.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) potentiometer (d) fuse
30. 30.What does a resistor do? (a) has coloured bands (b) senses how hot it is (c) smooths a wobbly supply (d) senses how bright it is
31. 31.True or false: an LED glows using little power. (a) False (b) True
32. 32.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) thermistor (d) resistor
33. 33.True or false: a transistor makes things spin. (a) True (b) False
34. 34.True or false: a motor makes things spin. (a) True (b) False
35. 35.🧩 Which component boosts a small signal? (a) diode (b) LDR (c) transistor (d) LED
36. 36.What does a buzzer do? (a) limits the current (b) smooths a wobbly supply (c) has coloured bands (d) beeps for an alarm
37. 37.What does a motor do? (a) is a resistance knob (b) limits the current (c) turns a fan or wheels (d) lets current go one way
38. 38.True or false: a capacitor makes things spin. (a) False (b) True
39. 39.True or false: a diode makes a beeping sound. (a) True (b) False
40. 40.What does a capacitor do? (a) blows if current is high (b) senses how hot it is (c) beeps for an alarm (d) smooths a wobbly supply

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