Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 594 · 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.True or false: a capacitor glows using little power. (a) False (b) True
2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
3. 3.True or false: a diode makes things spin. (a) True (b) False
4. 4.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) diode (d) resistor
5. 5.🧩 Which component senses how hot it is? (a) capacitor (b) LDR (c) thermistor (d) buzzer
6. 6.What does a diode do? (a) limits the current (b) smooths a wobbly supply (c) glows using little power (d) lets current go one way
7. 7.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) transistor (d) potentiometer
8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
9. 9.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
10. 10.What does an LED do? (a) lets current go one way (b) boosts a small signal (c) senses how bright it is (d) glows using little power
11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
12. 12.🧩 Which component beeps for an alarm? (a) fuse (b) resistor (c) transistor (d) buzzer
13. 13.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
14. 14.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) senses how hot it is (d) has coloured bands
15. 15.True or false: a motor makes things spin. (a) True (b) False
16. 16.What does a resistor do? (a) beeps for an alarm (b) stores a little charge (c) has coloured bands (d) senses how bright it is
17. 17.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) smooths a wobbly supply (d) turns a fan or wheels
18. 18.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) diode (d) transistor
19. 19.True or false: an LED glows using little power. (a) False (b) True
20. 20.What does a transistor do? (a) turns a fan or wheels (b) is a resistance knob (c) beeps for an alarm (d) boosts a small signal
21. 21.What does a motor do? (a) stores a little charge (b) makes things spin (c) has coloured bands (d) lets current go one way
22. 22.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) diode (d) LDR
23. 23.What does a resistor do? (a) makes a beeping sound (b) stores a little charge (c) blows if current is high (d) limits the current
24. 24.🧩 Which component glows using little power? (a) diode (b) potentiometer (c) LDR (d) LED
25. 25.🧩 Which component blows if current is high? (a) LED (b) potentiometer (c) buzzer (d) fuse
26. 26.True or false: a resistor smooths a wobbly supply. (a) False (b) True
27. 27.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) makes things spin
28. 28.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) resistor (d) LDR
29. 29.True or false: a potentiometer is a resistance knob. (a) True (b) False
30. 30.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) resistor (d) diode
31. 31.🧩 Which component limits the current? (a) resistor (b) fuse (c) thermistor (d) LED
32. 32.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
33. 33.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) smooths a wobbly supply (d) blows if current is high
34. 34.True or false: a buzzer makes a beeping sound. (a) False (b) True
35. 35.True or false: a thermistor makes things spin. (a) False (b) True
36. 36.What does a buzzer do? (a) beeps for an alarm (b) glows using little power (c) stores a little charge (d) limits the current
37. 37.True or false: a transistor stores a little charge. (a) True (b) False
38. 38.🧩 Which component lets current go one way? (a) diode (b) fuse (c) motor (d) capacitor
39. 39.True or false: a buzzer beeps for an alarm. (a) False (b) True
40. 40.True or false: a thermistor stores a little charge. (a) True (b) False

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