Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 478 · 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 buzzer turns a fan or wheels. (a) False (b) True
2. 2.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) has coloured bands (d) blows if current is high
3. 3.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) diode (d) buzzer
4. 4.True or false: a transistor senses how bright it is. (a) False (b) True
5. 5.What does a capacitor do? (a) smooths a wobbly supply (b) blows if current is high (c) lets current go one way (d) makes a beeping sound
6. 6.What does a thermistor do? (a) senses how hot it is (b) turns a fan or wheels (c) lets current go one way (d) beeps for an alarm
7. 7.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) stores a little charge (d) is a resistance knob
8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
9. 9.What does an LED do? (a) senses how hot it is (b) senses how bright it is (c) glows using little power (d) turns a fan or wheels
10. 10.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
11. 11.True or false: a resistor makes a beeping sound. (a) False (b) True
12. 12.What does a potentiometer do? (a) glows using little power (b) is a resistance knob (c) turns a fan or wheels (d) smooths a wobbly supply
13. 13.What does a fuse do? (a) lets current go one way (b) limits the current (c) glows using little power (d) blows if current is high
14. 14.True or false: a thermistor makes things spin. (a) True (b) False
15. 15.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) diode (d) fuse
16. 16.🧩 Which component turns a fan or wheels? (a) transistor (b) potentiometer (c) LED (d) motor
17. 17.🧩 Which component glows using little power? (a) LDR (b) LED (c) motor (d) diode
18. 18.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) senses how hot it is (d) makes a beeping sound
19. 19.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
20. 20.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) boosts a small signal (d) is a resistance knob
21. 21.What does a diode do? (a) glows using little power (b) lets current go one way (c) smooths a wobbly supply (d) senses how bright it is
22. 22.True or false: a buzzer beeps for an alarm. (a) True (b) False
23. 23.What does a buzzer do? (a) limits the current (b) lets current go one way (c) turns a fan or wheels (d) makes a beeping sound
24. 24.True or false: a capacitor limits the current. (a) False (b) True
25. 25.True or false: a resistor boosts a small signal. (a) False (b) True
26. 26.What does an LDR do? (a) makes things spin (b) is a resistance knob (c) senses how bright it is (d) limits the current
27. 27.🧩 Which component has coloured bands? (a) fuse (b) thermistor (c) resistor (d) transistor
28. 28.What does a motor do? (a) beeps for an alarm (b) makes things spin (c) smooths a wobbly supply (d) stores a little charge
29. 29.True or false: a capacitor turns a fan or wheels. (a) False (b) True
30. 30.True or false: a diode turns a fan or wheels. (a) True (b) False
31. 31.True or false: a resistor is a resistance knob. (a) True (b) False
32. 32.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) potentiometer (d) LED
33. 33.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
34. 34.What does a capacitor do? (a) blows if current is high (b) has coloured bands (c) makes a beeping sound (d) stores a little charge
35. 35.True or false: a resistor stores a little charge. (a) True (b) False
36. 36.True or false: an LED beeps for an alarm. (a) True (b) False
37. 37.🧩 Which component beeps for an alarm? (a) LDR (b) resistor (c) buzzer (d) fuse
38. 38.True or false: a diode lets current go one way. (a) True (b) False
39. 39.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) fuse (d) LED
40. 40.True or false: a motor limits the current. (a) True (b) False

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