Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 692 · 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.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
2. 2.True or false: a thermistor limits the current. (a) True (b) False
3. 3.🧩 Which component blows if current is high? (a) transistor (b) LED (c) fuse (d) buzzer
4. 4.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) stores a little charge (d) makes a beeping sound
5. 5.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) capacitor (d) buzzer
6. 6.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) fuse (d) diode
7. 7.What does a diode do? (a) is a resistance knob (b) makes things spin (c) smooths a wobbly supply (d) lets current go one way
8. 8.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) limits the current
9. 9.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
10. 10.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) motor (d) potentiometer
11. 11.True or false: a thermistor senses how hot it is. (a) True (b) False
12. 12.🧩 Which component is a resistance knob? (a) resistor (b) capacitor (c) potentiometer (d) LDR
13. 13.What does a resistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) has coloured bands (d) senses how bright it is
14. 14.🧩 Which component lets current go one way? (a) capacitor (b) thermistor (c) diode (d) LED
15. 15.🧩 Which component beeps for an alarm? (a) capacitor (b) transistor (c) potentiometer (d) buzzer
16. 16.What does a capacitor do? (a) makes things spin (b) senses how hot it is (c) stores a little charge (d) is a resistance knob
17. 17.True or false: a fuse blows if current is high. (a) True (b) False
18. 18.True or false: an LDR senses how bright it is. (a) False (b) True
19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
20. 20.True or false: a transistor smooths a wobbly supply. (a) False (b) True
21. 21.True or false: a capacitor stores a little charge. (a) True (b) False
22. 22.🧩 Which component makes things spin? (a) capacitor (b) transistor (c) motor (d) thermistor
23. 23.What does a buzzer do? (a) smooths a wobbly supply (b) limits the current (c) beeps for an alarm (d) is a resistance knob
24. 24.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) turns a fan or wheels (d) limits the current
25. 25.What does a potentiometer do? (a) beeps for an alarm (b) is a resistance knob (c) glows using little power (d) has coloured bands
26. 26.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) boosts a small signal
27. 27.True or false: a motor turns a fan or wheels. (a) True (b) False
28. 28.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
29. 29.True or false: an LED makes a beeping sound. (a) False (b) True
30. 30.True or false: a buzzer limits the current. (a) False (b) True
31. 31.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) capacitor (d) motor
32. 32.True or false: a buzzer senses how bright it is. (a) True (b) False
33. 33.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
34. 34.🧩 Which component boosts a small signal? (a) LED (b) potentiometer (c) fuse (d) transistor
35. 35.🧩 Which component makes a beeping sound? (a) capacitor (b) potentiometer (c) buzzer (d) diode
36. 36.🧩 Which component has coloured bands? (a) capacitor (b) diode (c) resistor (d) transistor
37. 37.True or false: a potentiometer lets current go one way. (a) True (b) False
38. 38.True or false: a diode is a resistance knob. (a) True (b) False
39. 39.What does a thermistor do? (a) blows if current is high (b) makes things spin (c) is a resistance knob (d) senses how hot it is
40. 40.🧩 Which component glows using little power? (a) LED (b) thermistor (c) transistor (d) resistor

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