Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 185 · 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.What does a buzzer do? (a) turns a fan or wheels (b) makes things spin (c) has coloured bands (d) beeps for an alarm
3. 3.True or false: a resistor has coloured bands. (a) True (b) False
4. 4.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) potentiometer (d) LED
5. 5.What does a potentiometer do? (a) smooths a wobbly supply (b) senses how bright it is (c) blows if current is high (d) is a resistance knob
6. 6.🧩 Which component lets current go one way? (a) LED (b) fuse (c) diode (d) capacitor
7. 7.🧩 Which component limits the current? (a) resistor (b) capacitor (c) thermistor (d) buzzer
8. 8.🧩 Which component boosts a small signal? (a) thermistor (b) LED (c) LDR (d) transistor
9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
10. 10.What does a motor do? (a) turns a fan or wheels (b) beeps for an alarm (c) makes a beeping sound (d) has coloured bands
11. 11.True or false: a diode turns a fan or wheels. (a) False (b) True
12. 12.What does a thermistor do? (a) senses how hot it is (b) is a resistance knob (c) makes a beeping sound (d) beeps for an alarm
13. 13.True or false: a thermistor senses how hot it is. (a) False (b) True
14. 14.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) glows using little power (d) makes things spin
15. 15.What does a transistor do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) boosts a small signal
16. 16.True or false: a potentiometer is a resistance knob. (a) True (b) False
17. 17.True or false: an LED glows using little power. (a) False (b) True
18. 18.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
19. 19.🧩 Which component glows using little power? (a) capacitor (b) fuse (c) LED (d) LDR
20. 20.True or false: a resistor smooths a wobbly supply. (a) True (b) False
21. 21.🧩 Which component blows if current is high? (a) fuse (b) LED (c) resistor (d) capacitor
22. 22.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) LDR (d) resistor
23. 23.What does a resistor do? (a) is a resistance knob (b) has coloured bands (c) makes things spin (d) senses how bright it is
24. 24.True or false: a transistor senses how hot it is. (a) False (b) True
25. 25.True or false: a buzzer limits the current. (a) True (b) False
26. 26.What does a fuse do? (a) beeps for an alarm (b) smooths a wobbly supply (c) blows if current is high (d) glows using little power
27. 27.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) LED (d) capacitor
28. 28.True or false: a thermistor is a resistance knob. (a) False (b) True
29. 29.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) senses how bright it is (d) has coloured bands
30. 30.What does an LDR do? (a) blows if current is high (b) glows using little power (c) smooths a wobbly supply (d) senses how bright it is
31. 31.True or false: a resistor is a resistance knob. (a) False (b) True
32. 32.🧩 Which component turns a fan or wheels? (a) transistor (b) LED (c) motor (d) thermistor
33. 33.True or false: a motor beeps for an alarm. (a) True (b) False
34. 34.🧩 Which component has coloured bands? (a) thermistor (b) LED (c) potentiometer (d) resistor
35. 35.What does a diode do? (a) limits the current (b) lets current go one way (c) is a resistance knob (d) makes a beeping sound
36. 36.True or false: a resistor limits the current. (a) False (b) True
37. 37.What does an LED do? (a) lets current go one way (b) turns a fan or wheels (c) stores a little charge (d) glows using little power
38. 38.True or false: a capacitor makes a beeping sound. (a) False (b) True
39. 39.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) diode (d) LED
40. 40.True or false: a buzzer is a resistance knob. (a) False (b) True

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