Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 606 · 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.What does a potentiometer do? (a) stores a little charge (b) turns a fan or wheels (c) is a resistance knob (d) makes a beeping sound
2. 2.What does an LDR do? (a) makes things spin (b) has coloured bands (c) turns a fan or wheels (d) senses how bright it is
3. 3.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
4. 4.True or false: a resistor has coloured bands. (a) True (b) False
5. 5.True or false: a buzzer glows using little power. (a) True (b) False
6. 6.What does a resistor do? (a) beeps for an alarm (b) lets current go one way (c) turns a fan or wheels (d) limits the current
7. 7.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) senses how hot it is (d) senses how bright it is
8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
9. 9.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
10. 10.🧩 Which component boosts a small signal? (a) resistor (b) capacitor (c) LDR (d) transistor
11. 11.🧩 Which component glows using little power? (a) potentiometer (b) fuse (c) transistor (d) LED
12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
13. 13.🧩 Which component beeps for an alarm? (a) motor (b) LDR (c) capacitor (d) buzzer
14. 14.True or false: a thermistor senses how hot it is. (a) False (b) True
15. 15.What does a thermistor do? (a) makes a beeping sound (b) makes things spin (c) boosts a small signal (d) senses how hot it is
16. 16.True or false: a buzzer senses how hot it is. (a) False (b) True
17. 17.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) glows using little power (d) has coloured bands
18. 18.🧩 Which component limits the current? (a) potentiometer (b) buzzer (c) resistor (d) thermistor
19. 19.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) thermistor (d) LED
20. 20.True or false: a potentiometer is a resistance knob. (a) False (b) True
21. 21.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) capacitor (d) motor
22. 22.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) transistor (d) thermistor
23. 23.🧩 Which component smooths a wobbly supply? (a) fuse (b) thermistor (c) capacitor (d) LED
24. 24.True or false: an LED glows using little power. (a) True (b) False
25. 25.🧩 Which component has coloured bands? (a) potentiometer (b) LDR (c) resistor (d) motor
26. 26.🧩 Which component is a resistance knob? (a) resistor (b) LDR (c) potentiometer (d) thermistor
27. 27.What does a motor do? (a) has coloured bands (b) makes things spin (c) lets current go one way (d) senses how bright it is
28. 28.What does a transistor do? (a) smooths a wobbly supply (b) has coloured bands (c) boosts a small signal (d) stores a little charge
29. 29.🧩 Which component stores a little charge? (a) motor (b) diode (c) LED (d) capacitor
30. 30.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) makes things spin (d) has coloured bands
31. 31.True or false: a buzzer beeps for an alarm. (a) False (b) True
32. 32.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) blows if current is high (d) is a resistance knob
33. 33.True or false: a resistor limits the current. (a) False (b) True
34. 34.True or false: a motor makes things spin. (a) False (b) True
35. 35.What does a buzzer do? (a) boosts a small signal (b) senses how bright it is (c) stores a little charge (d) makes a beeping sound
36. 36.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) boosts a small signal (d) turns a fan or wheels
37. 37.True or false: a capacitor senses how hot it is. (a) False (b) True
38. 38.What does a fuse do? (a) boosts a small signal (b) smooths a wobbly supply (c) blows if current is high (d) lets current go one way
39. 39.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
40. 40.True or false: an LDR turns a fan or wheels. (a) False (b) True

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