Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 356 · 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.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) makes things spin (d) is a resistance knob
2. 2.🧩 Which component makes a beeping sound? (a) LDR (b) transistor (c) potentiometer (d) buzzer
3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
4. 4.🧩 Which component turns a fan or wheels? (a) transistor (b) resistor (c) motor (d) LED
5. 5.🧩 Which component is a resistance knob? (a) LED (b) fuse (c) thermistor (d) potentiometer
6. 6.What does a motor do? (a) turns a fan or wheels (b) is a resistance knob (c) stores a little charge (d) has coloured bands
7. 7.What does a fuse do? (a) is a resistance knob (b) smooths a wobbly supply (c) stores a little charge (d) blows if current is high
8. 8.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
9. 9.True or false: a diode glows using little power. (a) False (b) True
10. 10.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) transistor (d) buzzer
11. 11.What does a diode do? (a) stores a little charge (b) blows if current is high (c) glows using little power (d) lets current go one way
12. 12.What does a buzzer do? (a) has coloured bands (b) smooths a wobbly supply (c) beeps for an alarm (d) lets current go one way
13. 13.True or false: a resistor limits the current. (a) True (b) False
14. 14.What does a thermistor do? (a) stores a little charge (b) lets current go one way (c) senses how hot it is (d) has coloured bands
15. 15.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
16. 16.🧩 Which component blows if current is high? (a) LED (b) fuse (c) buzzer (d) thermistor
17. 17.True or false: a potentiometer is a resistance knob. (a) False (b) True
18. 18.True or false: a motor makes things spin. (a) True (b) False
19. 19.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) transistor (d) thermistor
20. 20.True or false: a buzzer senses how hot it is. (a) True (b) False
21. 21.🧩 Which component lets current go one way? (a) diode (b) LDR (c) buzzer (d) resistor
22. 22.True or false: a thermistor lets current go one way. (a) False (b) True
23. 23.True or false: a transistor beeps for an alarm. (a) True (b) False
24. 24.What does a motor do? (a) limits the current (b) makes a beeping sound (c) boosts a small signal (d) makes things spin
25. 25.🧩 Which component glows using little power? (a) thermistor (b) LED (c) resistor (d) capacitor
26. 26.True or false: an LDR senses how bright it is. (a) False (b) True
27. 27.True or false: a motor stores a little charge. (a) False (b) True
28. 28.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) makes things spin (d) limits the current
29. 29.What does an LED do? (a) limits the current (b) is a resistance knob (c) glows using little power (d) senses how hot it is
30. 30.What does a resistor do? (a) boosts a small signal (b) is a resistance knob (c) limits the current (d) glows using little power
31. 31.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) beeps for an alarm (d) smooths a wobbly supply
32. 32.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) fuse (d) LED
33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
34. 34.🧩 Which component limits the current? (a) transistor (b) buzzer (c) fuse (d) resistor
35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
36. 36.🧩 Which component beeps for an alarm? (a) capacitor (b) fuse (c) diode (d) buzzer
37. 37.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) has coloured bands (d) makes a beeping sound
38. 38.True or false: a resistor blows if current is high. (a) True (b) False
39. 39.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) diode (d) thermistor
40. 40.True or false: a diode lets current go one way. (a) False (b) True

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