Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 374 · 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) make light (b) measure heat (c) store charge briefly (d) spin a wheel
2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
3. 3.🧩 Which component lets current go one way? (a) potentiometer (b) LED (c) transistor (d) diode
4. 4.What does a capacitor do? (a) smooths a wobbly supply (b) has coloured bands (c) senses how bright it is (d) lets current go one way
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
6. 6.What does a motor do? (a) limits the current (b) glows using little power (c) makes things spin (d) is a resistance knob
7. 7.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) transistor (d) potentiometer
8. 8.🧩 Which component makes a beeping sound? (a) thermistor (b) LED (c) resistor (d) buzzer
9. 9.🧩 Which component senses how hot it is? (a) diode (b) resistor (c) capacitor (d) thermistor
10. 10.What does a diode do? (a) boosts a small signal (b) stores a little charge (c) blows if current is high (d) lets current go one way
11. 11.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) buzzer (d) capacitor
12. 12.🧩 Which component beeps for an alarm? (a) LED (b) resistor (c) buzzer (d) transistor
13. 13.True or false: a transistor boosts a small signal. (a) True (b) False
14. 14.True or false: a diode beeps for an alarm. (a) False (b) True
15. 15.True or false: a resistor has coloured bands. (a) False (b) True
16. 16.True or false: a motor makes things spin. (a) True (b) False
17. 17.🧩 Which component boosts a small signal? (a) LED (b) resistor (c) transistor (d) motor
18. 18.What does an LDR do? (a) senses how hot it is (b) lets current go one way (c) senses how bright it is (d) has coloured bands
19. 19.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) turns a fan or wheels (d) blows if current is high
20. 20.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) beeps for an alarm (d) has coloured bands
21. 21.True or false: a thermistor senses how hot it is. (a) False (b) True
22. 22.True or false: a capacitor glows using little power. (a) False (b) True
23. 23.What does a capacitor do? (a) limits the current (b) lets current go one way (c) beeps for an alarm (d) stores a little charge
24. 24.What does a fuse do? (a) limits the current (b) blows if current is high (c) stores a little charge (d) is a resistance knob
25. 25.🧩 Which component glows using little power? (a) LED (b) fuse (c) LDR (d) potentiometer
26. 26.🧩 Which component senses how bright it is? (a) buzzer (b) LED (c) LDR (d) transistor
27. 27.🧩 Which component smooths a wobbly supply? (a) fuse (b) diode (c) capacitor (d) resistor
28. 28.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) stores a little charge (d) makes things spin
29. 29.True or false: a capacitor beeps for an alarm. (a) True (b) False
30. 30.True or false: a motor stores a little charge. (a) False (b) True
31. 31.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) beeps for an alarm (d) has coloured bands
32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
33. 33.True or false: a thermistor makes a beeping sound. (a) True (b) False
34. 34.True or false: a potentiometer is a resistance knob. (a) True (b) False
35. 35.What does a resistor do? (a) lets current go one way (b) beeps for an alarm (c) makes a beeping sound (d) limits the current
36. 36.What does a thermistor do? (a) boosts a small signal (b) makes a beeping sound (c) senses how hot it is (d) turns a fan or wheels
37. 37.True or false: an LDR turns a fan or wheels. (a) False (b) True
38. 38.True or false: a motor lets current go one way. (a) True (b) False
39. 39.True or false: a fuse blows if current is high. (a) True (b) False
40. 40.What does an LED do? (a) beeps for an alarm (b) makes things spin (c) is a resistance knob (d) glows using little power

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