Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 467 · 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) fuse (b) capacitor (c) potentiometer (d) buzzer
2. 2.True or false: a diode lets current go one way. (a) True (b) False
3. 3.🧩 Which component smooths a wobbly supply? (a) LED (b) transistor (c) buzzer (d) capacitor
4. 4.What does a fuse do? (a) lets current go one way (b) blows if current is high (c) has coloured bands (d) turns a fan or wheels
5. 5.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) LDR (d) thermistor
6. 6.What does a transistor do? (a) stores a little charge (b) blows if current is high (c) boosts a small signal (d) senses how hot it is
7. 7.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) motor (d) LDR
8. 8.True or false: an LED makes things spin. (a) False (b) True
9. 9.🧩 Which component glows using little power? (a) capacitor (b) resistor (c) diode (d) LED
10. 10.What does an LDR do? (a) smooths a wobbly supply (b) boosts a small signal (c) senses how bright it is (d) glows using little power
11. 11.🧩 Which component blows if current is high? (a) resistor (b) diode (c) fuse (d) motor
12. 12.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) capacitor (d) fuse
13. 13.What does a capacitor do? (a) makes a beeping sound (b) glows using little power (c) stores a little charge (d) boosts a small signal
14. 14.What does a potentiometer do? (a) blows if current is high (b) boosts a small signal (c) limits the current (d) is a resistance knob
15. 15.What does an LED do? (a) glows using little power (b) has coloured bands (c) lets current go one way (d) senses how bright it is
16. 16.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
17. 17.🧩 Which component boosts a small signal? (a) capacitor (b) motor (c) fuse (d) transistor
18. 18.True or false: a motor smooths a wobbly supply. (a) True (b) False
19. 19.🧩 Which component stores a little charge? (a) thermistor (b) potentiometer (c) capacitor (d) LDR
20. 20.True or false: a motor lets current go one way. (a) True (b) False
21. 21.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
22. 22.🧩 Which component lets current go one way? (a) motor (b) resistor (c) diode (d) transistor
23. 23.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
24. 24.🧩 Which component limits the current? (a) buzzer (b) potentiometer (c) resistor (d) LED
25. 25.What does a diode do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) makes a beeping sound
26. 26.🧩 Which component makes things spin? (a) potentiometer (b) fuse (c) LDR (d) motor
27. 27.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) capacitor (d) potentiometer
28. 28.🧩 Which component makes a beeping sound? (a) thermistor (b) capacitor (c) potentiometer (d) buzzer
29. 29.True or false: a transistor boosts a small signal. (a) False (b) True
30. 30.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) smooths a wobbly supply (d) boosts a small signal
31. 31.🧩 Which component senses how hot it is? (a) resistor (b) buzzer (c) capacitor (d) thermistor
32. 32.True or false: a buzzer turns a fan or wheels. (a) False (b) True
33. 33.True or false: a resistor limits the current. (a) True (b) False
34. 34.True or false: a buzzer beeps for an alarm. (a) False (b) True
35. 35.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) boosts a small signal (d) limits the current
36. 36.What does a resistor do? (a) has coloured bands (b) senses how hot it is (c) turns a fan or wheels (d) boosts a small signal
37. 37.True or false: a capacitor stores a little charge. (a) False (b) True
38. 38.True or false: a resistor has coloured bands. (a) True (b) False
39. 39.True or false: a fuse blows if current is high. (a) True (b) False
40. 40.What does a buzzer do? (a) blows if current is high (b) makes things spin (c) boosts a small signal (d) beeps for an alarm

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