Electronics Worksheet: Electronic Components

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

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