Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 51 · 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.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
2. 2.What does a diode do? (a) smooths a wobbly supply (b) blows if current is high (c) beeps for an alarm (d) lets current go one way
3. 3.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) buzzer
4. 4.True or false: a buzzer stores a little charge. (a) True (b) False
5. 5.True or false: a thermistor senses how hot it is. (a) True (b) False
6. 6.🧩 Which component makes a beeping sound? (a) thermistor (b) LDR (c) resistor (d) buzzer
7. 7.True or false: a potentiometer is a resistance knob. (a) False (b) True
8. 8.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) resistor (d) motor
9. 9.🧩 Which component boosts a small signal? (a) thermistor (b) capacitor (c) transistor (d) resistor
10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
11. 11.What does a fuse do? (a) boosts a small signal (b) stores a little charge (c) blows if current is high (d) is a resistance knob
12. 12.True or false: a motor turns a fan or wheels. (a) False (b) True
13. 13.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) lets current go one way (d) senses how bright it is
14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
15. 15.What does a transistor do? (a) stores a little charge (b) turns a fan or wheels (c) is a resistance knob (d) boosts a small signal
16. 16.🧩 Which component beeps for an alarm? (a) capacitor (b) resistor (c) buzzer (d) diode
17. 17.True or false: a capacitor glows using little power. (a) False (b) True
18. 18.🧩 Which component senses how bright it is? (a) fuse (b) thermistor (c) buzzer (d) LDR
19. 19.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) smooths a wobbly supply (d) lets current go one way
20. 20.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
21. 21.True or false: a resistor senses how hot it is. (a) True (b) False
22. 22.True or false: a buzzer beeps for an alarm. (a) False (b) True
23. 23.True or false: a potentiometer has coloured bands. (a) False (b) True
24. 24.What does a motor do? (a) makes a beeping sound (b) has coloured bands (c) turns a fan or wheels (d) senses how bright it is
25. 25.True or false: a potentiometer limits the current. (a) True (b) False
26. 26.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) beeps for an alarm (d) blows if current is high
27. 27.🧩 Which component senses how hot it is? (a) motor (b) fuse (c) thermistor (d) potentiometer
28. 28.What does a capacitor do? (a) turns a fan or wheels (b) senses how hot it is (c) stores a little charge (d) limits the current
29. 29.True or false: a motor stores a little charge. (a) False (b) True
30. 30.What does an LED do? (a) makes things spin (b) senses how hot it is (c) boosts a small signal (d) glows using little power
31. 31.What does a capacitor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) is a resistance knob (d) limits the current
32. 32.True or false: a buzzer is a resistance knob. (a) False (b) True
33. 33.True or false: a fuse makes a beeping sound. (a) False (b) True
34. 34.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
35. 35.🧩 Which component turns a fan or wheels? (a) fuse (b) thermistor (c) motor (d) capacitor
36. 36.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) LDR (d) motor
37. 37.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) blows if current is high (d) stores a little charge
38. 38.🧩 Which component makes things spin? (a) potentiometer (b) LDR (c) motor (d) diode
39. 39.True or false: a thermistor has coloured bands. (a) True (b) False
40. 40.What does a resistor do? (a) makes things spin (b) lets current go one way (c) glows using little power (d) limits the current

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