Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 341 · 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 an LED do? (a) glows using little power (b) turns a fan or wheels (c) limits the current (d) senses how bright it is
2. 2.True or false: an LDR senses how bright it is. (a) True (b) False
3. 3.True or false: a fuse makes a beeping sound. (a) True (b) False
4. 4.What does a fuse do? (a) blows if current is high (b) boosts a small signal (c) has coloured bands (d) lets current go one way
5. 5.🧩 Which component stores a little charge? (a) fuse (b) buzzer (c) potentiometer (d) capacitor
6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
8. 8.What does a capacitor do? (a) turns a fan or wheels (b) makes things spin (c) smooths a wobbly supply (d) makes a beeping sound
9. 9.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) LDR (d) capacitor
10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
11. 11.True or false: a buzzer lets current go one way. (a) False (b) True
12. 12.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) limits the current (d) senses how bright it is
13. 13.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
14. 14.What does a buzzer do? (a) makes a beeping sound (b) lets current go one way (c) boosts a small signal (d) blows if current is high
15. 15.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) resistor (d) capacitor
16. 16.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) fuse (d) resistor
17. 17.🧩 Which component limits the current? (a) LDR (b) transistor (c) motor (d) resistor
18. 18.True or false: a resistor smooths a wobbly supply. (a) True (b) False
19. 19.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LED (c) motor (d) capacitor
20. 20.True or false: a buzzer makes a beeping sound. (a) False (b) True
21. 21.🧩 Which component senses how bright it is? (a) potentiometer (b) capacitor (c) diode (d) LDR
22. 22.What does a buzzer do? (a) glows using little power (b) limits the current (c) beeps for an alarm (d) blows if current is high
23. 23.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) LDR (d) potentiometer
24. 24.True or false: an LED senses how bright it is. (a) True (b) False
25. 25.What does a motor do? (a) makes things spin (b) blows if current is high (c) smooths a wobbly supply (d) stores a little charge
26. 26.True or false: an LDR beeps for an alarm. (a) False (b) True
27. 27.What does an LDR do? (a) has coloured bands (b) blows if current is high (c) senses how bright it is (d) limits the current
28. 28.True or false: a transistor turns a fan or wheels. (a) False (b) True
29. 29.What does a transistor do? (a) blows if current is high (b) glows using little power (c) boosts a small signal (d) stores a little charge
30. 30.🧩 Which component blows if current is high? (a) fuse (b) motor (c) LDR (d) capacitor
31. 31.What does a thermistor do? (a) smooths a wobbly supply (b) has coloured bands (c) senses how hot it is (d) turns a fan or wheels
32. 32.What does a diode do? (a) smooths a wobbly supply (b) is a resistance knob (c) lets current go one way (d) makes a beeping sound
33. 33.True or false: a potentiometer lets current go one way. (a) False (b) True
34. 34.🧩 Which component glows using little power? (a) capacitor (b) LED (c) motor (d) buzzer
35. 35.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) buzzer (d) capacitor
36. 36.True or false: a thermistor makes things spin. (a) False (b) True
37. 37.What does a resistor do? (a) stores a little charge (b) blows if current is high (c) is a resistance knob (d) has coloured bands
38. 38.True or false: a potentiometer is a resistance knob. (a) True (b) False
39. 39.True or false: a transistor makes a beeping sound. (a) True (b) False
40. 40.True or false: a fuse turns a fan or wheels. (a) False (b) True

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