Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 547 · 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 buzzer do? (a) makes things spin (b) smooths a wobbly supply (c) senses how bright it is (d) beeps for an alarm
2. 2.What does an LED do? (a) glows using little power (b) stores a little charge (c) senses how bright it is (d) limits the current
3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
4. 4.🧩 Which component turns a fan or wheels? (a) fuse (b) diode (c) motor (d) resistor
5. 5.What does a resistor do? (a) has coloured bands (b) makes things spin (c) makes a beeping sound (d) lets current go one way
6. 6.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) capacitor (d) potentiometer
7. 7.True or false: a fuse blows if current is high. (a) False (b) True
8. 8.What does a thermistor do? (a) lets current go one way (b) boosts a small signal (c) limits the current (d) senses how hot it is
9. 9.🧩 Which component has coloured bands? (a) buzzer (b) fuse (c) potentiometer (d) resistor
10. 10.True or false: an LDR makes things spin. (a) False (b) True
11. 11.What does a motor do? (a) limits the current (b) blows if current is high (c) turns a fan or wheels (d) senses how hot it is
12. 12.What does a diode do? (a) boosts a small signal (b) is a resistance knob (c) lets current go one way (d) limits the current
13. 13.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) blows if current is high (d) is a resistance knob
14. 14.True or false: a thermistor senses how hot it is. (a) True (b) False
15. 15.True or false: a transistor blows if current is high. (a) False (b) True
16. 16.True or false: a resistor makes a beeping sound. (a) False (b) True
17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
18. 18.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) senses how bright it is (d) lets current go one way
19. 19.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
20. 20.True or false: a resistor boosts a small signal. (a) True (b) False
21. 21.What does a fuse do? (a) limits the current (b) smooths a wobbly supply (c) blows if current is high (d) has coloured bands
22. 22.🧩 Which component glows using little power? (a) motor (b) LDR (c) diode (d) LED
23. 23.True or false: a capacitor boosts a small signal. (a) False (b) True
24. 24.What does a resistor do? (a) limits the current (b) stores a little charge (c) smooths a wobbly supply (d) makes things spin
25. 25.🧩 Which component stores a little charge? (a) buzzer (b) diode (c) thermistor (d) capacitor
26. 26.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) potentiometer (d) diode
27. 27.What does a transistor do? (a) blows if current is high (b) senses how bright it is (c) has coloured bands (d) boosts a small signal
28. 28.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) diode (d) LDR
29. 29.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) boosts a small signal
30. 30.What does a motor do? (a) makes things spin (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
31. 31.True or false: a motor makes things spin. (a) False (b) True
32. 32.True or false: a potentiometer is a resistance knob. (a) True (b) False
33. 33.🧩 Which component beeps for an alarm? (a) potentiometer (b) LED (c) buzzer (d) capacitor
34. 34.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) motor (d) buzzer
35. 35.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) potentiometer (d) fuse
36. 36.🧩 Which component lets current go one way? (a) diode (b) resistor (c) potentiometer (d) transistor
37. 37.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
38. 38.True or false: a diode lets current go one way. (a) False (b) True
39. 39.True or false: a resistor glows using little power. (a) False (b) True
40. 40.True or false: a transistor smooths a wobbly supply. (a) True (b) False

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