Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 635 · 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) spin a wheel (b) store charge briefly (c) measure heat (d) make light
2. 2.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) capacitor (d) fuse
3. 3.True or false: a thermistor turns a fan or wheels. (a) False (b) True
4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
5. 5.True or false: a capacitor stores a little charge. (a) False (b) True
6. 6.What does a transistor do? (a) stores a little charge (b) beeps for an alarm (c) boosts a small signal (d) makes things spin
7. 7.True or false: an LED smooths a wobbly supply. (a) True (b) False
8. 8.What does a diode do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) stores a little charge
9. 9.What does a thermistor do? (a) glows using little power (b) boosts a small signal (c) senses how hot it is (d) beeps for an alarm
10. 10.True or false: a motor makes things spin. (a) False (b) True
11. 11.🧩 Which component has coloured bands? (a) LED (b) resistor (c) fuse (d) capacitor
12. 12.True or false: a diode senses how hot it is. (a) True (b) False
13. 13.What does a potentiometer do? (a) is a resistance knob (b) glows using little power (c) stores a little charge (d) has coloured bands
14. 14.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) diode (d) LED
15. 15.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
16. 16.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) senses how hot it is (d) senses how bright it is
17. 17.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) stores a little charge (d) boosts a small signal
18. 18.True or false: a capacitor makes a beeping sound. (a) True (b) False
19. 19.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
20. 20.🧩 Which component turns a fan or wheels? (a) potentiometer (b) buzzer (c) motor (d) fuse
21. 21.What does a resistor do? (a) has coloured bands (b) senses how hot it is (c) makes a beeping sound (d) senses how bright it is
22. 22.What does a fuse do? (a) smooths a wobbly supply (b) makes a beeping sound (c) senses how bright it is (d) blows if current is high
23. 23.🧩 Which component smooths a wobbly supply? (a) thermistor (b) diode (c) capacitor (d) LED
24. 24.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) boosts a small signal (d) stores a little charge
25. 25.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) thermistor (d) potentiometer
26. 26.True or false: a potentiometer limits the current. (a) True (b) False
27. 27.True or false: a motor turns a fan or wheels. (a) False (b) True
28. 28.True or false: a potentiometer glows using little power. (a) False (b) True
29. 29.True or false: a transistor smooths a wobbly supply. (a) False (b) True
30. 30.🧩 Which component makes a beeping sound? (a) transistor (b) fuse (c) resistor (d) buzzer
31. 31.True or false: a thermistor senses how bright it is. (a) True (b) False
32. 32.What does an LED do? (a) glows using little power (b) limits the current (c) blows if current is high (d) lets current go one way
33. 33.🧩 Which component blows if current is high? (a) diode (b) capacitor (c) fuse (d) thermistor
34. 34.What does a motor do? (a) makes things spin (b) is a resistance knob (c) senses how bright it is (d) has coloured bands
35. 35.True or false: a thermistor is a resistance knob. (a) False (b) True
36. 36.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) capacitor (d) LED
37. 37.True or false: a buzzer makes a beeping sound. (a) False (b) True
38. 38.🧩 Which component lets current go one way? (a) transistor (b) diode (c) fuse (d) motor
39. 39.True or false: a buzzer beeps for an alarm. (a) False (b) True
40. 40.🧩 Which component glows using little power? (a) LED (b) motor (c) transistor (d) diode

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