Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 307 · 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 an LED do? (a) glows using little power (b) makes things spin (c) is a resistance knob (d) makes a beeping sound
2. 2.What does a transistor do? (a) limits the current (b) boosts a small signal (c) stores a little charge (d) has coloured bands
3. 3.What does a motor do? (a) blows if current is high (b) turns a fan or wheels (c) limits the current (d) senses how hot it is
4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
5. 5.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) transistor (d) capacitor
6. 6.True or false: an LED glows using little power. (a) True (b) False
7. 7.🧩 Which component stores a little charge? (a) LED (b) potentiometer (c) resistor (d) capacitor
8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
9. 9.🧩 Which component turns a fan or wheels? (a) thermistor (b) resistor (c) motor (d) diode
10. 10.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) LDR (d) potentiometer
11. 11.What does a motor do? (a) boosts a small signal (b) smooths a wobbly supply (c) senses how bright it is (d) makes things spin
12. 12.What does a capacitor do? (a) glows using little power (b) has coloured bands (c) makes a beeping sound (d) stores a little charge
13. 13.What does a potentiometer do? (a) senses how hot it is (b) beeps for an alarm (c) is a resistance knob (d) glows using little power
14. 14.What does a diode do? (a) senses how hot it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) lets current go one way
15. 15.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) resistor (d) buzzer
16. 16.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
17. 17.True or false: an LDR has coloured bands. (a) True (b) False
18. 18.What does an LDR do? (a) stores a little charge (b) makes things spin (c) has coloured bands (d) senses how bright it is
19. 19.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) LED (d) diode
20. 20.True or false: a motor makes things spin. (a) True (b) False
21. 21.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) diode (d) capacitor
22. 22.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) glows using little power (d) stores a little charge
23. 23.What does a fuse do? (a) makes things spin (b) glows using little power (c) limits the current (d) blows if current is high
24. 24.True or false: a buzzer blows if current is high. (a) True (b) False
25. 25.🧩 Which component beeps for an alarm? (a) resistor (b) LED (c) transistor (d) buzzer
26. 26.True or false: an LED stores a little charge. (a) True (b) False
27. 27.True or false: a diode senses how hot it is. (a) False (b) True
28. 28.True or false: a resistor has coloured bands. (a) False (b) True
29. 29.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) potentiometer (d) transistor
30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
31. 31.What does a buzzer do? (a) has coloured bands (b) senses how bright it is (c) smooths a wobbly supply (d) makes a beeping sound
32. 32.True or false: an LED blows if current is high. (a) False (b) True
33. 33.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) buzzer (d) motor
34. 34.True or false: an LDR turns a fan or wheels. (a) False (b) True
35. 35.🧩 Which component boosts a small signal? (a) thermistor (b) capacitor (c) LED (d) transistor
36. 36.True or false: a resistor blows if current is high. (a) False (b) True
37. 37.What does a thermistor do? (a) makes a beeping sound (b) stores a little charge (c) senses how hot it is (d) smooths a wobbly supply
38. 38.🧩 Which component lets current go one way? (a) diode (b) fuse (c) motor (d) transistor
39. 39.What does a resistor do? (a) boosts a small signal (b) limits the current (c) senses how bright it is (d) lets current go one way
40. 40.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False

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