Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 675 · 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 motor makes things spin. (a) True (b) False
2. 2.What does a capacitor do? (a) beeps for an alarm (b) lets current go one way (c) makes things spin (d) smooths a wobbly supply
3. 3.What does a buzzer do? (a) smooths a wobbly supply (b) is a resistance knob (c) glows using little power (d) makes a beeping sound
4. 4.🧩 Which component senses how hot it is? (a) potentiometer (b) fuse (c) diode (d) thermistor
5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
6. 6.True or false: a transistor turns a fan or wheels. (a) True (b) False
7. 7.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) turns a fan or wheels (d) limits the current
8. 8.True or false: a resistor limits the current. (a) True (b) False
9. 9.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
10. 10.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) lets current go one way (d) glows using little power
11. 11.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) LED (d) buzzer
12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
13. 13.🧩 Which component beeps for an alarm? (a) resistor (b) motor (c) LDR (d) buzzer
14. 14.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) blows if current is high (d) is a resistance knob
15. 15.🧩 Which component makes a beeping sound? (a) LED (b) resistor (c) LDR (d) buzzer
16. 16.True or false: a thermistor senses how hot it is. (a) False (b) True
17. 17.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) transistor (d) LDR
18. 18.True or false: a resistor has coloured bands. (a) False (b) True
19. 19.🧩 Which component has coloured bands? (a) fuse (b) thermistor (c) resistor (d) transistor
20. 20.True or false: a resistor turns a fan or wheels. (a) True (b) False
21. 21.What does a resistor do? (a) makes a beeping sound (b) blows if current is high (c) limits the current (d) senses how bright it is
22. 22.What does a resistor do? (a) senses how hot it is (b) has coloured bands (c) makes things spin (d) boosts a small signal
23. 23.🧩 Which component turns a fan or wheels? (a) resistor (b) potentiometer (c) motor (d) fuse
24. 24.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) boosts a small signal (d) is a resistance knob
25. 25.True or false: a buzzer makes a beeping sound. (a) True (b) False
26. 26.True or false: a fuse turns a fan or wheels. (a) True (b) False
27. 27.🧩 Which component smooths a wobbly supply? (a) buzzer (b) motor (c) capacitor (d) LDR
28. 28.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) blows if current is high (d) beeps for an alarm
29. 29.🧩 Which component boosts a small signal? (a) LED (b) motor (c) transistor (d) resistor
30. 30.True or false: a diode beeps for an alarm. (a) True (b) False
31. 31.What does a buzzer do? (a) stores a little charge (b) has coloured bands (c) beeps for an alarm (d) makes things spin
32. 32.True or false: a motor stores a little charge. (a) True (b) False
33. 33.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) glows using little power (d) is a resistance knob
34. 34.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) smooths a wobbly supply
35. 35.True or false: a transistor senses how bright it is. (a) True (b) False
36. 36.🧩 Which component senses how bright it is? (a) fuse (b) transistor (c) thermistor (d) LDR
37. 37.True or false: a potentiometer is a resistance knob. (a) True (b) False
38. 38.What does an LED do? (a) makes a beeping sound (b) is a resistance knob (c) glows using little power (d) has coloured bands
39. 39.True or false: a thermistor limits the current. (a) True (b) False
40. 40.True or false: a thermistor makes things spin. (a) True (b) False

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