Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 557 · 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 diode (b) a buzzer (c) a capacitor (d) a resistor
2. 2.True or false: an LDR senses how bright it is. (a) True (b) False
3. 3.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) limits the current (d) blows if current is high
4. 4.🧩 Which component glows using little power? (a) resistor (b) LDR (c) LED (d) potentiometer
5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
6. 6.🧩 Which component smooths a wobbly supply? (a) diode (b) LDR (c) transistor (d) capacitor
7. 7.What does a transistor do? (a) makes things spin (b) turns a fan or wheels (c) beeps for an alarm (d) boosts a small signal
8. 8.True or false: a transistor has coloured bands. (a) False (b) True
9. 9.What does a diode do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) is a resistance knob (d) lets current go one way
10. 10.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) has coloured bands (d) stores a little charge
11. 11.🧩 Which component senses how hot it is? (a) potentiometer (b) LDR (c) thermistor (d) LED
12. 12.True or false: a capacitor boosts a small signal. (a) False (b) True
13. 13.True or false: a fuse stores a little charge. (a) False (b) True
14. 14.What does an LED do? (a) smooths a wobbly supply (b) makes a beeping sound (c) limits the current (d) glows using little power
15. 15.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) transistor (d) motor
16. 16.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
17. 17.What does a motor do? (a) makes things spin (b) has coloured bands (c) smooths a wobbly supply (d) lets current go one way
18. 18.True or false: a buzzer beeps for an alarm. (a) False (b) True
19. 19.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) beeps for an alarm (d) senses how hot it is
20. 20.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) makes a beeping sound (d) turns a fan or wheels
21. 21.True or false: an LDR limits the current. (a) False (b) True
22. 22.🧩 Which component limits the current? (a) fuse (b) resistor (c) LED (d) capacitor
23. 23.🧩 Which component makes things spin? (a) capacitor (b) buzzer (c) motor (d) LDR
24. 24.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) LDR (d) fuse
25. 25.What does a fuse do? (a) is a resistance knob (b) makes things spin (c) turns a fan or wheels (d) blows if current is high
26. 26.🧩 Which component senses how bright it is? (a) potentiometer (b) fuse (c) LDR (d) LED
27. 27.True or false: a potentiometer blows if current is high. (a) True (b) False
28. 28.🧩 Which component beeps for an alarm? (a) capacitor (b) diode (c) fuse (d) buzzer
29. 29.True or false: a motor stores a little charge. (a) True (b) False
30. 30.🧩 Which component lets current go one way? (a) transistor (b) thermistor (c) buzzer (d) diode
31. 31.🧩 Which component is a resistance knob? (a) motor (b) LED (c) thermistor (d) potentiometer
32. 32.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) limits the current (d) turns a fan or wheels
33. 33.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) boosts a small signal (d) limits the current
34. 34.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) transistor (d) potentiometer
35. 35.True or false: an LED glows using little power. (a) False (b) True
36. 36.True or false: a motor makes things spin. (a) True (b) False
37. 37.🧩 Which component boosts a small signal? (a) resistor (b) buzzer (c) transistor (d) potentiometer
38. 38.True or false: a thermistor stores a little charge. (a) True (b) False
39. 39.True or false: a resistor turns a fan or wheels. (a) True (b) False
40. 40.True or false: an LED beeps for an alarm. (a) True (b) False

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