Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 345 · 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 part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
2. 2.What does a capacitor do? (a) boosts a small signal (b) limits the current (c) makes a beeping sound (d) stores a little charge
3. 3.What does a fuse do? (a) blows if current is high (b) is a resistance knob (c) limits the current (d) boosts a small signal
4. 4.What does a buzzer do? (a) blows if current is high (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
6. 6.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) LED (d) capacitor
7. 7.What does a transistor do? (a) senses how bright it is (b) smooths a wobbly supply (c) boosts a small signal (d) has coloured bands
8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
9. 9.True or false: a diode lets current go one way. (a) False (b) True
10. 10.What does a capacitor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) makes a beeping sound (d) limits the current
11. 11.🧩 Which component beeps for an alarm? (a) capacitor (b) fuse (c) buzzer (d) motor
12. 12.True or false: a resistor has coloured bands. (a) True (b) False
13. 13.True or false: a diode makes things spin. (a) False (b) True
14. 14.What does a diode do? (a) boosts a small signal (b) has coloured bands (c) makes things spin (d) lets current go one way
15. 15.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) motor (d) LED
16. 16.What does a thermistor do? (a) has coloured bands (b) senses how hot it is (c) stores a little charge (d) limits the current
17. 17.True or false: a resistor limits the current. (a) False (b) True
18. 18.🧩 Which component makes things spin? (a) potentiometer (b) thermistor (c) transistor (d) motor
19. 19.True or false: a resistor turns a fan or wheels. (a) True (b) False
20. 20.What does a motor do? (a) boosts a small signal (b) smooths a wobbly supply (c) turns a fan or wheels (d) is a resistance knob
21. 21.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) capacitor (d) buzzer
22. 22.🧩 Which component blows if current is high? (a) LED (b) fuse (c) diode (d) thermistor
23. 23.True or false: an LED senses how bright it is. (a) False (b) True
24. 24.True or false: a diode turns a fan or wheels. (a) True (b) False
25. 25.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) smooths a wobbly supply (d) stores a little charge
26. 26.What does an LED do? (a) stores a little charge (b) lets current go one way (c) senses how bright it is (d) glows using little power
27. 27.What does a motor do? (a) limits the current (b) is a resistance knob (c) blows if current is high (d) makes things spin
28. 28.True or false: a thermistor makes things spin. (a) False (b) True
29. 29.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) glows using little power (d) turns a fan or wheels
30. 30.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
31. 31.True or false: a buzzer senses how hot it is. (a) True (b) False
32. 32.True or false: a transistor has coloured bands. (a) True (b) False
33. 33.🧩 Which component limits the current? (a) transistor (b) motor (c) resistor (d) buzzer
34. 34.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) diode (d) potentiometer
35. 35.🧩 Which component glows using little power? (a) LDR (b) diode (c) transistor (d) LED
36. 36.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) fuse (d) capacitor
37. 37.🧩 Which component smooths a wobbly supply? (a) transistor (b) potentiometer (c) thermistor (d) capacitor
38. 38.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) diode (d) motor
39. 39.True or false: a resistor boosts a small signal. (a) True (b) False
40. 40.True or false: a buzzer turns a fan or wheels. (a) False (b) True

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