Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 85 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
3. 3.🧩 Which component turns a fan or wheels? (a) transistor (b) resistor (c) motor (d) buzzer
4. 4.What does a motor do? (a) makes things spin (b) is a resistance knob (c) blows if current is high (d) stores a little charge
5. 5.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) fuse (d) LED
6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
7. 7.🧩 Which component limits the current? (a) thermistor (b) LDR (c) diode (d) resistor
8. 8.What does a transistor do? (a) boosts a small signal (b) senses how hot it is (c) smooths a wobbly supply (d) turns a fan or wheels
9. 9.True or false: an LED lets current go one way. (a) True (b) False
10. 10.What does a fuse do? (a) lets current go one way (b) blows if current is high (c) limits the current (d) beeps for an alarm
11. 11.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) LDR (d) resistor
12. 12.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) capacitor (d) fuse
13. 13.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) has coloured bands (d) turns a fan or wheels
14. 14.🧩 Which component makes things spin? (a) motor (b) capacitor (c) fuse (d) diode
15. 15.What does a resistor do? (a) makes a beeping sound (b) stores a little charge (c) has coloured bands (d) glows using little power
16. 16.What does a diode do? (a) lets current go one way (b) smooths a wobbly supply (c) stores a little charge (d) is a resistance knob
17. 17.🧩 Which component glows using little power? (a) LED (b) diode (c) motor (d) buzzer
18. 18.True or false: an LED limits the current. (a) True (b) False
19. 19.What does a resistor do? (a) turns a fan or wheels (b) limits the current (c) beeps for an alarm (d) makes a beeping sound
20. 20.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) motor (d) resistor
21. 21.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) resistor (d) thermistor
22. 22.True or false: a transistor blows if current is high. (a) True (b) False
23. 23.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) diode (d) transistor
24. 24.What does a thermistor do? (a) is a resistance knob (b) lets current go one way (c) senses how hot it is (d) stores a little charge
25. 25.🧩 Which component makes a beeping sound? (a) capacitor (b) fuse (c) buzzer (d) thermistor
26. 26.🧩 Which component blows if current is high? (a) resistor (b) motor (c) fuse (d) capacitor
27. 27.True or false: a potentiometer is a resistance knob. (a) False (b) True
28. 28.🧩 Which component stores a little charge? (a) buzzer (b) potentiometer (c) capacitor (d) diode
29. 29.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) transistor (d) capacitor
30. 30.What does a buzzer do? (a) senses how hot it is (b) blows if current is high (c) glows using little power (d) makes a beeping sound
31. 31.True or false: a resistor has coloured bands. (a) False (b) True
32. 32.What does an LED do? (a) lets current go one way (b) turns a fan or wheels (c) makes a beeping sound (d) glows using little power
33. 33.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) boosts a small signal (d) blows if current is high
34. 34.True or false: a potentiometer glows using little power. (a) True (b) False
35. 35.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) limits the current (d) has coloured bands
36. 36.True or false: a transistor senses how bright it is. (a) True (b) False
37. 37.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
38. 38.What does a motor do? (a) lets current go one way (b) smooths a wobbly supply (c) turns a fan or wheels (d) beeps for an alarm
39. 39.True or false: a diode lets current go one way. (a) True (b) False
40. 40.🧩 Which component senses how hot it is? (a) potentiometer (b) resistor (c) thermistor (d) capacitor

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