Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 369 · 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 buzzer (b) a diode (c) a resistor (d) a capacitor
2. 2.True or false: a motor turns a fan or wheels. (a) False (b) True
3. 3.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
4. 4.True or false: a fuse senses how hot it is. (a) True (b) False
5. 5.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) resistor (d) fuse
6. 6.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) limits the current (d) beeps for an alarm
7. 7.What does a fuse do? (a) glows using little power (b) smooths a wobbly supply (c) has coloured bands (d) blows if current is high
8. 8.What does a motor do? (a) makes things spin (b) beeps for an alarm (c) limits the current (d) makes a beeping sound
9. 9.🧩 Which component senses how hot it is? (a) LED (b) diode (c) resistor (d) thermistor
10. 10.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) motor (d) diode
11. 11.What does a resistor do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) boosts a small signal
12. 12.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) beeps for an alarm (d) lets current go one way
13. 13.What does a diode do? (a) stores a little charge (b) lets current go one way (c) limits the current (d) smooths a wobbly supply
14. 14.What does a capacitor do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) lets current go one way
15. 15.🧩 Which component senses how bright it is? (a) thermistor (b) capacitor (c) LDR (d) potentiometer
16. 16.What does a resistor do? (a) turns a fan or wheels (b) has coloured bands (c) senses how bright it is (d) smooths a wobbly supply
17. 17.What does a buzzer do? (a) stores a little charge (b) boosts a small signal (c) glows using little power (d) makes a beeping sound
18. 18.🧩 Which component lets current go one way? (a) fuse (b) diode (c) transistor (d) buzzer
19. 19.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) is a resistance knob (d) stores a little charge
20. 20.What does a potentiometer do? (a) makes things spin (b) senses how hot it is (c) lets current go one way (d) is a resistance knob
21. 21.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
22. 22.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) fuse (d) motor
23. 23.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
25. 25.True or false: an LED glows using little power. (a) False (b) True
26. 26.What does an LED do? (a) makes a beeping sound (b) beeps for an alarm (c) is a resistance knob (d) glows using little power
27. 27.True or false: an LED has coloured bands. (a) False (b) True
28. 28.True or false: a resistor has coloured bands. (a) True (b) False
29. 29.True or false: a resistor beeps for an alarm. (a) True (b) False
30. 30.True or false: a fuse stores a little charge. (a) False (b) True
31. 31.True or false: a buzzer glows using little power. (a) False (b) True
32. 32.🧩 Which component beeps for an alarm? (a) LDR (b) resistor (c) buzzer (d) thermistor
33. 33.🧩 Which component limits the current? (a) LDR (b) capacitor (c) thermistor (d) resistor
34. 34.True or false: a thermistor senses how hot it is. (a) True (b) False
35. 35.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
36. 36.🧩 Which component has coloured bands? (a) LED (b) capacitor (c) fuse (d) resistor
37. 37.True or false: a motor senses how bright it is. (a) False (b) True
38. 38.True or false: a thermistor makes a beeping sound. (a) False (b) True
39. 39.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) makes things spin
40. 40.🧩 Which component makes things spin? (a) LED (b) motor (c) LDR (d) potentiometer

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