Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 543 · 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) diode (b) motor (c) fuse (d) transistor
2. 2.True or false: a potentiometer is a resistance knob. (a) False (b) True
3. 3.🧩 Which component blows if current is high? (a) diode (b) fuse (c) transistor (d) motor
4. 4.What does a motor do? (a) senses how hot it is (b) makes a beeping sound (c) makes things spin (d) glows using little power
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
6. 6.True or false: a capacitor stores a little charge. (a) True (b) False
7. 7.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) stores a little charge (d) glows using little power
8. 8.True or false: a potentiometer limits the current. (a) False (b) True
9. 9.🧩 Which component has coloured bands? (a) LED (b) buzzer (c) capacitor (d) resistor
10. 10.True or false: a diode boosts a small signal. (a) True (b) False
11. 11.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
12. 12.What does an LED do? (a) limits the current (b) glows using little power (c) has coloured bands (d) beeps for an alarm
13. 13.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) has coloured bands (d) beeps for an alarm
14. 14.🧩 Which component smooths a wobbly supply? (a) motor (b) thermistor (c) LED (d) capacitor
15. 15.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) blows if current is high (d) limits the current
16. 16.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) transistor (d) capacitor
17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
18. 18.🧩 Which component makes a beeping sound? (a) motor (b) LED (c) diode (d) buzzer
19. 19.🧩 Which component limits the current? (a) LDR (b) capacitor (c) fuse (d) resistor
20. 20.What does a motor do? (a) beeps for an alarm (b) is a resistance knob (c) turns a fan or wheels (d) senses how bright it is
21. 21.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) resistor (d) potentiometer
22. 22.What does a capacitor do? (a) senses how bright it is (b) blows if current is high (c) makes a beeping sound (d) smooths a wobbly supply
23. 23.🧩 Which component boosts a small signal? (a) LED (b) diode (c) transistor (d) resistor
24. 24.What does a buzzer do? (a) lets current go one way (b) boosts a small signal (c) makes a beeping sound (d) smooths a wobbly supply
25. 25.True or false: a capacitor limits the current. (a) True (b) False
26. 26.True or false: a fuse limits the current. (a) False (b) True
27. 27.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
28. 28.What does a buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) has coloured bands (d) glows using little power
29. 29.True or false: an LED stores a little charge. (a) True (b) False
30. 30.True or false: a motor lets current go one way. (a) False (b) True
31. 31.True or false: a fuse beeps for an alarm. (a) False (b) True
32. 32.True or false: a thermistor senses how hot it is. (a) False (b) True
33. 33.What does a diode do? (a) blows if current is high (b) stores a little charge (c) lets current go one way (d) makes a beeping sound
34. 34.True or false: a buzzer beeps for an alarm. (a) True (b) False
35. 35.True or false: a diode stores a little charge. (a) False (b) True
36. 36.True or false: a fuse makes things spin. (a) True (b) False
37. 37.🧩 Which component glows using little power? (a) motor (b) potentiometer (c) capacitor (d) LED
38. 38.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) resistor (d) LED
39. 39.What does a transistor do? (a) is a resistance knob (b) makes things spin (c) makes a beeping sound (d) boosts a small signal
40. 40.What does a fuse do? (a) blows if current is high (b) is a resistance knob (c) makes things spin (d) boosts a small signal

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