Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 630 · 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 an LDR do? (a) senses how bright it is (b) senses how hot it is (c) makes things spin (d) smooths a wobbly supply
2. 2.🧩 Which component is a resistance knob? (a) capacitor (b) LDR (c) potentiometer (d) thermistor
3. 3.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
5. 5.What does a potentiometer do? (a) beeps for an alarm (b) makes a beeping sound (c) is a resistance knob (d) stores a little charge
6. 6.True or false: an LDR senses how hot it is. (a) True (b) False
7. 7.What does a fuse do? (a) has coloured bands (b) smooths a wobbly supply (c) blows if current is high (d) glows using little power
8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
10. 10.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) has coloured bands (d) makes things spin
11. 11.🧩 Which component turns a fan or wheels? (a) resistor (b) potentiometer (c) LED (d) motor
12. 12.True or false: a buzzer has coloured bands. (a) False (b) True
13. 13.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) senses how bright it is (d) has coloured bands
14. 14.True or false: a buzzer beeps for an alarm. (a) False (b) True
15. 15.🧩 Which component stores a little charge? (a) potentiometer (b) diode (c) LDR (d) capacitor
16. 16.True or false: a resistor glows using little power. (a) True (b) False
17. 17.True or false: a capacitor stores a little charge. (a) True (b) False
18. 18.True or false: a potentiometer is a resistance knob. (a) False (b) True
19. 19.What does a thermistor do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how hot it is (d) has coloured bands
20. 20.🧩 Which component limits the current? (a) transistor (b) fuse (c) resistor (d) thermistor
21. 21.🧩 Which component boosts a small signal? (a) potentiometer (b) resistor (c) transistor (d) LDR
22. 22.What does a resistor do? (a) limits the current (b) glows using little power (c) turns a fan or wheels (d) stores a little charge
23. 23.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) buzzer (d) resistor
24. 24.What does an LED do? (a) boosts a small signal (b) limits the current (c) senses how hot it is (d) glows using little power
25. 25.What does a motor do? (a) smooths a wobbly supply (b) limits the current (c) beeps for an alarm (d) makes things spin
26. 26.🧩 Which component has coloured bands? (a) diode (b) LDR (c) transistor (d) resistor
27. 27.What does a motor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) stores a little charge (d) makes a beeping sound
28. 28.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) LDR (d) motor
29. 29.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) diode (d) fuse
30. 30.True or false: a buzzer turns a fan or wheels. (a) True (b) False
31. 31.True or false: an LED glows using little power. (a) False (b) True
32. 32.True or false: a resistor has coloured bands. (a) False (b) True
33. 33.🧩 Which component makes a beeping sound? (a) capacitor (b) thermistor (c) buzzer (d) LED
34. 34.What does a resistor do? (a) boosts a small signal (b) senses how hot it is (c) has coloured bands (d) makes a beeping sound
35. 35.True or false: a diode limits the current. (a) True (b) False
36. 36.What does a capacitor do? (a) turns a fan or wheels (b) boosts a small signal (c) stores a little charge (d) has coloured bands
37. 37.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) diode (d) resistor
38. 38.True or false: a motor makes things spin. (a) False (b) True
39. 39.🧩 Which component beeps for an alarm? (a) motor (b) LED (c) transistor (d) buzzer
40. 40.True or false: a fuse blows if current is high. (a) True (b) False

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