Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 493 · 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 capacitor (c) a resistor (d) a buzzer
2. 2.What does a capacitor do? (a) senses how hot it is (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
3. 3.🧩 Which component turns a fan or wheels? (a) fuse (b) potentiometer (c) motor (d) LED
4. 4.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) thermistor (d) fuse
5. 5.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) glows using little power (d) senses how hot it is
6. 6.True or false: a diode glows using little power. (a) True (b) False
7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
8. 8.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) buzzer (d) thermistor
9. 9.True or false: a resistor limits the current. (a) False (b) True
10. 10.What does a potentiometer do? (a) senses how hot it is (b) boosts a small signal (c) stores a little charge (d) is a resistance knob
11. 11.What does a resistor do? (a) is a resistance knob (b) has coloured bands (c) smooths a wobbly supply (d) turns a fan or wheels
12. 12.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) transistor (d) thermistor
13. 13.What does a thermistor do? (a) glows using little power (b) has coloured bands (c) lets current go one way (d) senses how hot it is
14. 14.True or false: a potentiometer has coloured bands. (a) True (b) False
15. 15.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) motor (d) transistor
16. 16.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) has coloured bands (d) glows using little power
17. 17.True or false: a motor limits the current. (a) True (b) False
18. 18.What does a diode do? (a) lets current go one way (b) blows if current is high (c) glows using little power (d) smooths a wobbly supply
19. 19.True or false: a fuse limits the current. (a) False (b) True
20. 20.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) blows if current is high (d) makes things spin
21. 21.🧩 Which component is a resistance knob? (a) LED (b) buzzer (c) fuse (d) potentiometer
22. 22.🧩 Which component has coloured bands? (a) diode (b) LDR (c) capacitor (d) resistor
23. 23.🧩 Which component boosts a small signal? (a) buzzer (b) potentiometer (c) transistor (d) LED
24. 24.True or false: a fuse blows if current is high. (a) False (b) True
25. 25.🧩 Which component lets current go one way? (a) thermistor (b) buzzer (c) resistor (d) diode
26. 26.True or false: a diode lets current go one way. (a) True (b) False
27. 27.What does an LDR do? (a) is a resistance knob (b) senses how hot it is (c) glows using little power (d) senses how bright it is
28. 28.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) transistor (d) capacitor
29. 29.🧩 Which component limits the current? (a) capacitor (b) resistor (c) LDR (d) potentiometer
30. 30.🧩 Which component blows if current is high? (a) buzzer (b) capacitor (c) fuse (d) thermistor
31. 31.What does a resistor do? (a) stores a little charge (b) glows using little power (c) limits the current (d) turns a fan or wheels
32. 32.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
33. 33.True or false: a motor turns a fan or wheels. (a) True (b) False
34. 34.What does a motor do? (a) is a resistance knob (b) boosts a small signal (c) makes things spin (d) glows using little power
35. 35.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) is a resistance knob (d) limits the current
36. 36.True or false: a fuse senses how hot it is. (a) True (b) False
37. 37.True or false: an LED glows using little power. (a) False (b) True
38. 38.🧩 Which component glows using little power? (a) fuse (b) motor (c) LED (d) capacitor
39. 39.True or false: a capacitor glows using little power. (a) True (b) False
40. 40.True or false: an LED turns a fan or wheels. (a) True (b) False

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