Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 46 · 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 stores a little charge? (a) thermistor (b) buzzer (c) motor (d) capacitor
2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
3. 3.🧩 Which component glows using little power? (a) thermistor (b) LED (c) diode (d) resistor
4. 4.True or false: a transistor beeps for an alarm. (a) True (b) False
5. 5.What does an LDR do? (a) lets current go one way (b) senses how hot it is (c) smooths a wobbly supply (d) senses how bright it is
6. 6.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) boosts a small signal (d) lets current go one way
7. 7.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) smooths a wobbly supply (d) senses how hot it is
8. 8.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) diode (d) resistor
9. 9.True or false: a buzzer beeps for an alarm. (a) True (b) False
10. 10.🧩 Which component blows if current is high? (a) buzzer (b) motor (c) resistor (d) fuse
11. 11.True or false: an LDR boosts a small signal. (a) True (b) False
12. 12.🧩 Which component senses how bright it is? (a) thermistor (b) LED (c) capacitor (d) LDR
13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
14. 14.🧩 Which component makes things spin? (a) capacitor (b) diode (c) motor (d) buzzer
15. 15.True or false: an LDR senses how bright it is. (a) False (b) True
16. 16.True or false: a capacitor senses how hot it is. (a) True (b) False
17. 17.True or false: an LED glows using little power. (a) False (b) True
18. 18.True or false: a fuse turns a fan or wheels. (a) False (b) True
19. 19.What does a buzzer do? (a) glows using little power (b) turns a fan or wheels (c) limits the current (d) beeps for an alarm
20. 20.What does a capacitor do? (a) beeps for an alarm (b) limits the current (c) lets current go one way (d) stores a little charge
21. 21.True or false: an LDR has coloured bands. (a) True (b) False
22. 22.What does an LED do? (a) blows if current is high (b) glows using little power (c) makes a beeping sound (d) has coloured bands
23. 23.🧩 Which component lets current go one way? (a) capacitor (b) buzzer (c) diode (d) LED
24. 24.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) diode (d) thermistor
25. 25.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) senses how bright it is (d) smooths a wobbly supply
26. 26.What does a potentiometer do? (a) is a resistance knob (b) smooths a wobbly supply (c) turns a fan or wheels (d) stores a little charge
27. 27.What does a resistor do? (a) makes things spin (b) is a resistance knob (c) stores a little charge (d) limits the current
28. 28.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
29. 29.What does a capacitor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) beeps for an alarm (d) glows using little power
30. 30.🧩 Which component boosts a small signal? (a) fuse (b) thermistor (c) LED (d) transistor
31. 31.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) resistor (d) fuse
32. 32.🧩 Which component turns a fan or wheels? (a) LDR (b) transistor (c) motor (d) potentiometer
33. 33.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) potentiometer (d) transistor
34. 34.True or false: a fuse makes a beeping sound. (a) False (b) True
35. 35.True or false: a transistor boosts a small signal. (a) False (b) True
36. 36.What does a fuse do? (a) blows if current is high (b) glows using little power (c) senses how hot it is (d) stores a little charge
37. 37.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) transistor (d) buzzer
38. 38.What does a thermistor do? (a) stores a little charge (b) glows using little power (c) turns a fan or wheels (d) senses how hot it is
39. 39.True or false: a capacitor beeps for an alarm. (a) True (b) False
40. 40.🧩 Which component beeps for an alarm? (a) transistor (b) capacitor (c) buzzer (d) potentiometer

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