Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 266 · 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) make light (b) store charge briefly (c) measure heat (d) spin a wheel
2. 2.What does a buzzer do? (a) senses how hot it is (b) turns a fan or wheels (c) makes a beeping sound (d) smooths a wobbly supply
3. 3.🧩 Which component beeps for an alarm? (a) motor (b) LED (c) buzzer (d) capacitor
4. 4.What does a potentiometer do? (a) makes a beeping sound (b) makes things spin (c) turns a fan or wheels (d) is a resistance knob
5. 5.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) buzzer (d) LED
6. 6.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
7. 7.🧩 Which component senses how hot it is? (a) motor (b) potentiometer (c) capacitor (d) thermistor
8. 8.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
9. 9.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) blows if current is high (d) limits the current
10. 10.True or false: a diode has coloured bands. (a) True (b) False
11. 11.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) resistor (d) fuse
12. 12.True or false: an LDR senses how hot it is. (a) False (b) True
13. 13.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
14. 14.True or false: an LED glows using little power. (a) True (b) False
15. 15.True or false: an LDR senses how bright it is. (a) False (b) True
16. 16.🧩 Which component makes things spin? (a) resistor (b) motor (c) buzzer (d) fuse
17. 17.True or false: a thermistor senses how hot it is. (a) False (b) True
18. 18.What does a capacitor do? (a) makes things spin (b) is a resistance knob (c) boosts a small signal (d) smooths a wobbly supply
19. 19.🧩 Which component blows if current is high? (a) LDR (b) motor (c) capacitor (d) fuse
20. 20.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) LED (d) diode
21. 21.True or false: a fuse senses how bright it is. (a) True (b) False
22. 22.True or false: a transistor turns a fan or wheels. (a) False (b) True
23. 23.True or false: a resistor has coloured bands. (a) False (b) True
24. 24.True or false: a thermistor is a resistance knob. (a) True (b) False
25. 25.True or false: an LED senses how bright it is. (a) False (b) True
26. 26.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) senses how hot it is (d) smooths a wobbly supply
27. 27.What does a fuse do? (a) boosts a small signal (b) senses how hot it is (c) is a resistance knob (d) blows if current is high
28. 28.True or false: a buzzer makes a beeping sound. (a) True (b) False
29. 29.True or false: a resistor limits the current. (a) False (b) True
30. 30.What does a resistor do? (a) makes a beeping sound (b) stores a little charge (c) lets current go one way (d) limits the current
31. 31.What does a transistor do? (a) stores a little charge (b) blows if current is high (c) has coloured bands (d) boosts a small signal
32. 32.🧩 Which component limits the current? (a) LED (b) resistor (c) transistor (d) buzzer
33. 33.What does a thermistor do? (a) limits the current (b) makes a beeping sound (c) senses how hot it is (d) lets current go one way
34. 34.True or false: a transistor boosts a small signal. (a) True (b) False
35. 35.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) capacitor (d) potentiometer
36. 36.What does an LED do? (a) senses how bright it is (b) glows using little power (c) limits the current (d) smooths a wobbly supply
37. 37.What does an LDR do? (a) limits the current (b) lets current go one way (c) has coloured bands (d) senses how bright it is
38. 38.True or false: a diode makes a beeping sound. (a) True (b) False
39. 39.What does a diode do? (a) blows if current is high (b) beeps for an alarm (c) lets current go one way (d) boosts a small signal
40. 40.True or false: an LDR boosts a small signal. (a) True (b) False

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