Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 472 · 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 potentiometer do? (a) smooths a wobbly supply (b) lets current go one way (c) stores a little charge (d) is a resistance knob
2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
3. 3.🧩 Which component turns a fan or wheels? (a) motor (b) diode (c) potentiometer (d) thermistor
4. 4.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) makes a beeping sound (d) stores a little charge
5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
6. 6.🧩 Which component boosts a small signal? (a) motor (b) potentiometer (c) transistor (d) buzzer
7. 7.🧩 Which component limits the current? (a) diode (b) resistor (c) motor (d) fuse
8. 8.What does a capacitor do? (a) glows using little power (b) lets current go one way (c) blows if current is high (d) stores a little charge
9. 9.🧩 Which component stores a little charge? (a) diode (b) LDR (c) capacitor (d) fuse
10. 10.True or false: a motor boosts a small signal. (a) True (b) False
11. 11.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
12. 12.🧩 Which component glows using little power? (a) buzzer (b) resistor (c) motor (d) LED
13. 13.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) diode (d) thermistor
14. 14.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) has coloured bands (d) blows if current is high
15. 15.🧩 Which component is a resistance knob? (a) motor (b) LED (c) buzzer (d) potentiometer
16. 16.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) diode (d) motor
17. 17.🧩 Which component has coloured bands? (a) resistor (b) motor (c) fuse (d) capacitor
18. 18.True or false: an LDR senses how bright it is. (a) False (b) True
19. 19.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) makes things spin (d) turns a fan or wheels
20. 20.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
21. 21.True or false: a motor turns a fan or wheels. (a) True (b) False
22. 22.True or false: a diode lets current go one way. (a) False (b) True
23. 23.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) senses how hot it is (d) blows if current is high
24. 24.What does a motor do? (a) senses how bright it is (b) is a resistance knob (c) makes things spin (d) stores a little charge
25. 25.What does an LED do? (a) senses how hot it is (b) glows using little power (c) has coloured bands (d) makes things spin
26. 26.True or false: a motor makes things spin. (a) True (b) False
27. 27.What does a buzzer do? (a) boosts a small signal (b) turns a fan or wheels (c) is a resistance knob (d) beeps for an alarm
28. 28.True or false: a diode smooths a wobbly supply. (a) False (b) True
29. 29.What does a capacitor do? (a) limits the current (b) turns a fan or wheels (c) smooths a wobbly supply (d) senses how bright it is
30. 30.True or false: a potentiometer senses how hot it is. (a) False (b) True
31. 31.True or false: a transistor boosts a small signal. (a) False (b) True
32. 32.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) transistor (d) thermistor
33. 33.🧩 Which component lets current go one way? (a) transistor (b) diode (c) buzzer (d) resistor
34. 34.True or false: an LDR smooths a wobbly supply. (a) False (b) True
35. 35.True or false: a potentiometer is a resistance knob. (a) True (b) False
36. 36.What does a fuse do? (a) stores a little charge (b) boosts a small signal (c) makes a beeping sound (d) blows if current is high
37. 37.True or false: a buzzer lets current go one way. (a) True (b) False
38. 38.True or false: a capacitor beeps for an alarm. (a) True (b) False
39. 39.True or false: a motor senses how bright it is. (a) False (b) True
40. 40.What does a thermistor do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) senses how hot it is

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