Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 95 · 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 motor do? (a) is a resistance knob (b) smooths a wobbly supply (c) makes things spin (d) makes a beeping sound
2. 2.🧩 Which component makes things spin? (a) LED (b) capacitor (c) motor (d) buzzer
3. 3.🧩 Which component limits the current? (a) transistor (b) fuse (c) LDR (d) resistor
4. 4.True or false: a potentiometer limits the current. (a) True (b) False
5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
6. 6.What does a diode do? (a) makes things spin (b) senses how hot it is (c) is a resistance knob (d) lets current go one way
7. 7.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
9. 9.What does a buzzer do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) blows if current is high
10. 10.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
11. 11.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) is a resistance knob (d) makes things spin
12. 12.True or false: a resistor has coloured bands. (a) False (b) True
13. 13.What does a capacitor do? (a) makes a beeping sound (b) makes things spin (c) smooths a wobbly supply (d) senses how bright it is
14. 14.What does a potentiometer do? (a) senses how bright it is (b) limits the current (c) smooths a wobbly supply (d) is a resistance knob
15. 15.🧩 Which component has coloured bands? (a) LDR (b) fuse (c) transistor (d) resistor
16. 16.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
17. 17.What does an LED do? (a) senses how hot it is (b) has coloured bands (c) turns a fan or wheels (d) glows using little power
18. 18.True or false: a motor makes things spin. (a) False (b) True
19. 19.What does an LDR do? (a) boosts a small signal (b) turns a fan or wheels (c) senses how bright it is (d) blows if current is high
20. 20.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) transistor (d) resistor
21. 21.True or false: a potentiometer has coloured bands. (a) True (b) False
22. 22.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) LDR (d) potentiometer
23. 23.What does a motor do? (a) blows if current is high (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
24. 24.What does a fuse do? (a) has coloured bands (b) beeps for an alarm (c) glows using little power (d) blows if current is high
25. 25.True or false: a diode senses how bright it is. (a) False (b) True
26. 26.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) capacitor (d) diode
27. 27.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) buzzer (d) diode
28. 28.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) fuse (d) diode
29. 29.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) capacitor (d) diode
30. 30.True or false: a fuse blows if current is high. (a) True (b) False
31. 31.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) potentiometer (d) LED
32. 32.True or false: a fuse smooths a wobbly supply. (a) False (b) True
33. 33.🧩 Which component senses how bright it is? (a) motor (b) buzzer (c) resistor (d) LDR
34. 34.What does a buzzer do? (a) stores a little charge (b) has coloured bands (c) makes a beeping sound (d) is a resistance knob
35. 35.True or false: a diode beeps for an alarm. (a) False (b) True
36. 36.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) has coloured bands (d) makes things spin
37. 37.True or false: a buzzer blows if current is high. (a) True (b) False
38. 38.True or false: a diode senses how hot it is. (a) True (b) False
39. 39.True or false: a buzzer beeps for an alarm. (a) False (b) True
40. 40.What does a capacitor do? (a) makes things spin (b) limits the current (c) boosts a small signal (d) stores a little charge

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