Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 382 · 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 capacitor (b) a diode (c) a buzzer (d) a resistor
2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
3. 3.🧩 Which component beeps for an alarm? (a) potentiometer (b) resistor (c) LDR (d) buzzer
4. 4.🧩 Which component boosts a small signal? (a) diode (b) buzzer (c) LED (d) transistor
5. 5.True or false: a capacitor senses how bright it is. (a) True (b) False
6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
7. 7.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) limits the current
8. 8.True or false: a resistor has coloured bands. (a) False (b) True
9. 9.🧩 Which component is a resistance knob? (a) transistor (b) LED (c) potentiometer (d) buzzer
10. 10.🧩 Which component limits the current? (a) resistor (b) motor (c) LDR (d) capacitor
11. 11.What does a thermistor do? (a) stores a little charge (b) smooths a wobbly supply (c) limits the current (d) senses how hot it is
12. 12.What does a buzzer do? (a) blows if current is high (b) limits the current (c) smooths a wobbly supply (d) makes a beeping sound
13. 13.What does a transistor do? (a) boosts a small signal (b) lets current go one way (c) turns a fan or wheels (d) stores a little charge
14. 14.🧩 Which component senses how hot it is? (a) transistor (b) capacitor (c) resistor (d) thermistor
15. 15.True or false: a transistor has coloured bands. (a) False (b) True
16. 16.True or false: a buzzer is a resistance knob. (a) False (b) True
17. 17.🧩 Which component makes things spin? (a) resistor (b) potentiometer (c) buzzer (d) motor
18. 18.True or false: a fuse blows if current is high. (a) True (b) False
19. 19.🧩 Which component has coloured bands? (a) transistor (b) diode (c) resistor (d) fuse
20. 20.True or false: a capacitor stores a little charge. (a) True (b) False
21. 21.🧩 Which component makes a beeping sound? (a) motor (b) fuse (c) buzzer (d) potentiometer
22. 22.What does an LED do? (a) senses how hot it is (b) glows using little power (c) beeps for an alarm (d) boosts a small signal
23. 23.🧩 Which component lets current go one way? (a) resistor (b) diode (c) potentiometer (d) capacitor
24. 24.What does a resistor do? (a) is a resistance knob (b) smooths a wobbly supply (c) has coloured bands (d) senses how hot it is
25. 25.True or false: a motor makes things spin. (a) False (b) True
26. 26.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) blows if current is high (d) limits the current
27. 27.What does a buzzer do? (a) blows if current is high (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
28. 28.What does a fuse do? (a) blows if current is high (b) limits the current (c) beeps for an alarm (d) senses how bright it is
29. 29.True or false: a capacitor limits the current. (a) True (b) False
30. 30.🧩 Which component blows if current is high? (a) thermistor (b) resistor (c) fuse (d) transistor
31. 31.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) motor (d) LED
32. 32.What does a resistor do? (a) glows using little power (b) limits the current (c) makes things spin (d) beeps for an alarm
33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
34. 34.What does a motor do? (a) stores a little charge (b) senses how hot it is (c) makes things spin (d) has coloured bands
35. 35.What does a capacitor do? (a) stores a little charge (b) is a resistance knob (c) makes a beeping sound (d) has coloured bands
36. 36.What does an LDR do? (a) stores a little charge (b) boosts a small signal (c) blows if current is high (d) senses how bright it is
37. 37.True or false: a fuse makes a beeping sound. (a) True (b) False
38. 38.True or false: a fuse smooths a wobbly supply. (a) False (b) True
39. 39.True or false: a resistor blows if current is high. (a) False (b) True
40. 40.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) thermistor (d) potentiometer

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