Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 112 · 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 turns a fan or wheels? (a) transistor (b) resistor (c) LDR (d) motor
2. 2.True or false: a fuse blows if current is high. (a) True (b) False
3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
4. 4.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) LDR (d) resistor
5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
6. 6.True or false: a buzzer beeps for an alarm. (a) True (b) False
7. 7.🧩 Which component limits the current? (a) fuse (b) transistor (c) motor (d) resistor
8. 8.What does a transistor do? (a) glows using little power (b) limits the current (c) boosts a small signal (d) stores a little charge
9. 9.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) lets current go one way (d) limits the current
10. 10.🧩 Which component senses how bright it is? (a) transistor (b) capacitor (c) LDR (d) resistor
11. 11.True or false: a motor makes things spin. (a) False (b) True
12. 12.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) diode (d) motor
13. 13.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) senses how hot it is (d) smooths a wobbly supply
14. 14.True or false: an LED beeps for an alarm. (a) False (b) True
15. 15.What does a motor do? (a) makes things spin (b) lets current go one way (c) blows if current is high (d) stores a little charge
16. 16.🧩 Which component stores a little charge? (a) diode (b) thermistor (c) transistor (d) capacitor
17. 17.🧩 Which component glows using little power? (a) LED (b) motor (c) buzzer (d) LDR
18. 18.True or false: a diode is a resistance knob. (a) False (b) True
19. 19.What does a motor do? (a) turns a fan or wheels (b) stores a little charge (c) beeps for an alarm (d) is a resistance knob
20. 20.True or false: a resistor limits the current. (a) True (b) False
21. 21.What does a thermistor do? (a) stores a little charge (b) boosts a small signal (c) makes things spin (d) senses how hot it is
22. 22.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
23. 23.True or false: an LDR stores a little charge. (a) False (b) True
24. 24.True or false: a resistor senses how hot it is. (a) False (b) True
25. 25.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) potentiometer (d) LED
26. 26.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) resistor (d) transistor
27. 27.🧩 Which component makes a beeping sound? (a) transistor (b) capacitor (c) thermistor (d) buzzer
28. 28.What does an LDR do? (a) turns a fan or wheels (b) limits the current (c) senses how bright it is (d) makes a beeping sound
29. 29.🧩 Which component lets current go one way? (a) potentiometer (b) fuse (c) buzzer (d) diode
30. 30.True or false: a buzzer turns a fan or wheels. (a) True (b) False
31. 31.True or false: an LDR makes things spin. (a) False (b) True
32. 32.🧩 Which component has coloured bands? (a) diode (b) resistor (c) transistor (d) buzzer
33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
34. 34.What does a buzzer do? (a) is a resistance knob (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
35. 35.True or false: a resistor has coloured bands. (a) False (b) True
36. 36.🧩 Which component beeps for an alarm? (a) capacitor (b) potentiometer (c) buzzer (d) thermistor
37. 37.True or false: an LED stores a little charge. (a) True (b) False
38. 38.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) beeps for an alarm (d) stores a little charge
39. 39.🧩 Which component senses how hot it is? (a) LDR (b) buzzer (c) transistor (d) thermistor
40. 40.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) stores a little charge (d) makes a beeping sound

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