Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 598 · 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 transistor do? (a) boosts a small signal (b) senses how bright it is (c) stores a little charge (d) glows using little power
2. 2.True or false: a resistor makes a beeping sound. (a) True (b) False
3. 3.🧩 Which component limits the current? (a) buzzer (b) resistor (c) potentiometer (d) thermistor
4. 4.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) makes a beeping sound (d) limits the current
5. 5.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) potentiometer (d) capacitor
6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
7. 7.What does a buzzer do? (a) turns a fan or wheels (b) is a resistance knob (c) stores a little charge (d) makes a beeping sound
8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
9. 9.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) blows if current is high (d) has coloured bands
10. 10.True or false: a buzzer lets current go one way. (a) True (b) False
11. 11.What does a fuse do? (a) turns a fan or wheels (b) blows if current is high (c) smooths a wobbly supply (d) makes a beeping sound
12. 12.True or false: a motor makes things spin. (a) True (b) False
13. 13.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) diode (d) transistor
14. 14.True or false: an LDR senses how bright it is. (a) False (b) True
15. 15.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) LDR (d) potentiometer
16. 16.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) fuse (d) buzzer
17. 17.What does a buzzer do? (a) turns a fan or wheels (b) blows if current is high (c) beeps for an alarm (d) senses how bright it is
18. 18.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
19. 19.True or false: a capacitor is a resistance knob. (a) False (b) True
20. 20.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LDR (d) diode
21. 21.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) thermistor (d) motor
22. 22.True or false: a resistor is a resistance knob. (a) True (b) False
23. 23.🧩 Which component stores a little charge? (a) thermistor (b) LDR (c) LED (d) capacitor
24. 24.🧩 Which component makes things spin? (a) transistor (b) LDR (c) LED (d) motor
25. 25.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) senses how hot it is (d) glows using little power
26. 26.True or false: a motor senses how hot it is. (a) True (b) False
27. 27.True or false: a fuse blows if current is high. (a) False (b) True
28. 28.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) LED (d) potentiometer
29. 29.True or false: a buzzer beeps for an alarm. (a) True (b) False
30. 30.True or false: a diode senses how bright it is. (a) True (b) False
31. 31.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
32. 32.What does an LED do? (a) is a resistance knob (b) glows using little power (c) senses how bright it is (d) stores a little charge
33. 33.🧩 Which component senses how bright it is? (a) LDR (b) transistor (c) resistor (d) LED
34. 34.True or false: a potentiometer senses how bright it is. (a) True (b) False
35. 35.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) resistor (d) LDR
36. 36.True or false: a diode senses how hot it is. (a) False (b) True
37. 37.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) boosts a small signal (d) has coloured bands
38. 38.True or false: a diode stores a little charge. (a) False (b) True
39. 39.True or false: a resistor lets current go one way. (a) True (b) False
40. 40.🧩 Which component senses how hot it is? (a) capacitor (b) resistor (c) thermistor (d) fuse

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