Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 404 · 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 beeps for an alarm? (a) potentiometer (b) LDR (c) capacitor (d) buzzer
2. 2.True or false: a capacitor senses how hot it is. (a) True (b) False
3. 3.🧩 Which component limits the current? (a) capacitor (b) resistor (c) potentiometer (d) thermistor
4. 4.🧩 Which component lets current go one way? (a) capacitor (b) resistor (c) fuse (d) diode
5. 5.What does a motor do? (a) beeps for an alarm (b) boosts a small signal (c) makes a beeping sound (d) turns a fan or wheels
6. 6.🧩 Which component senses how hot it is? (a) motor (b) LDR (c) transistor (d) thermistor
7. 7.What does an LED do? (a) senses how hot it is (b) stores a little charge (c) makes a beeping sound (d) glows using little power
8. 8.What does a thermistor do? (a) stores a little charge (b) senses how hot it is (c) makes things spin (d) glows using little power
9. 9.🧩 Which component is a resistance knob? (a) fuse (b) diode (c) potentiometer (d) capacitor
10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
11. 11.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) LED (c) thermistor (d) capacitor
12. 12.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
13. 13.True or false: a buzzer makes a beeping sound. (a) False (b) True
14. 14.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) makes a beeping sound (d) stores a little charge
15. 15.🧩 Which component boosts a small signal? (a) motor (b) thermistor (c) transistor (d) LED
16. 16.True or false: a buzzer beeps for an alarm. (a) False (b) True
17. 17.What does a resistor do? (a) stores a little charge (b) limits the current (c) boosts a small signal (d) smooths a wobbly supply
18. 18.True or false: a fuse smooths a wobbly supply. (a) True (b) False
19. 19.What does a diode do? (a) smooths a wobbly supply (b) limits the current (c) lets current go one way (d) senses how bright it is
20. 20.🧩 Which component makes things spin? (a) resistor (b) motor (c) LDR (d) buzzer
21. 21.True or false: a fuse limits the current. (a) True (b) False
22. 22.🧩 Which component stores a little charge? (a) potentiometer (b) diode (c) LED (d) capacitor
23. 23.🧩 Which component has coloured bands? (a) thermistor (b) fuse (c) buzzer (d) resistor
24. 24.🧩 Which component glows using little power? (a) LED (b) fuse (c) potentiometer (d) buzzer
25. 25.True or false: a resistor limits the current. (a) False (b) True
26. 26.What does a buzzer do? (a) is a resistance knob (b) blows if current is high (c) makes a beeping sound (d) senses how bright it is
27. 27.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
28. 28.What does a motor do? (a) lets current go one way (b) limits the current (c) makes a beeping sound (d) makes things spin
29. 29.True or false: a diode has coloured bands. (a) False (b) True
30. 30.True or false: a diode boosts a small signal. (a) False (b) True
31. 31.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
32. 32.True or false: a transistor is a resistance knob. (a) True (b) False
33. 33.True or false: a potentiometer is a resistance knob. (a) False (b) True
34. 34.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) lets current go one way (d) glows using little power
35. 35.True or false: a buzzer has coloured bands. (a) True (b) False
36. 36.True or false: a buzzer is a resistance knob. (a) False (b) True
37. 37.True or false: a transistor boosts a small signal. (a) True (b) False
38. 38.What does a capacitor do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) glows using little power
39. 39.What does a transistor do? (a) has coloured bands (b) glows using little power (c) boosts a small signal (d) limits the current
40. 40.🧩 Which component blows if current is high? (a) fuse (b) motor (c) capacitor (d) LED

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