Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 545 · 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) beeps for an alarm (b) glows using little power (c) has coloured bands (d) is a resistance knob
2. 2.What does a resistor do? (a) boosts a small signal (b) limits the current (c) senses how hot it is (d) makes a beeping sound
3. 3.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) LDR (d) capacitor
4. 4.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
5. 5.🧩 Which component limits the current? (a) resistor (b) motor (c) potentiometer (d) thermistor
6. 6.True or false: a thermistor makes a beeping sound. (a) True (b) False
7. 7.What does a transistor do? (a) stores a little charge (b) has coloured bands (c) boosts a small signal (d) beeps for an alarm
8. 8.True or false: a motor has coloured bands. (a) False (b) True
9. 9.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
10. 10.What does a motor do? (a) turns a fan or wheels (b) senses how hot it is (c) limits the current (d) makes a beeping sound
11. 11.🧩 Which component senses how hot it is? (a) diode (b) motor (c) LED (d) thermistor
12. 12.True or false: a resistor smooths a wobbly supply. (a) True (b) False
13. 13.🧩 Which component makes things spin? (a) motor (b) resistor (c) potentiometer (d) LED
14. 14.True or false: a motor makes a beeping sound. (a) True (b) False
15. 15.What does a buzzer do? (a) senses how hot it is (b) turns a fan or wheels (c) beeps for an alarm (d) lets current go one way
16. 16.What does a resistor do? (a) smooths a wobbly supply (b) has coloured bands (c) makes a beeping sound (d) glows using little power
17. 17.True or false: a buzzer makes a beeping sound. (a) True (b) False
18. 18.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) LDR (d) potentiometer
19. 19.True or false: a thermistor senses how hot it is. (a) True (b) False
20. 20.🧩 Which component blows if current is high? (a) motor (b) LDR (c) fuse (d) diode
21. 21.🧩 Which component has coloured bands? (a) resistor (b) diode (c) transistor (d) motor
22. 22.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
23. 23.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) boosts a small signal (d) smooths a wobbly supply
24. 24.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) potentiometer (d) LED
25. 25.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) diode (d) potentiometer
26. 26.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) resistor (d) LDR
27. 27.True or false: a thermistor stores a little charge. (a) True (b) False
28. 28.What does a capacitor do? (a) has coloured bands (b) turns a fan or wheels (c) stores a little charge (d) is a resistance knob
29. 29.What does a diode do? (a) lets current go one way (b) stores a little charge (c) makes a beeping sound (d) limits the current
30. 30.🧩 Which component is a resistance knob? (a) capacitor (b) motor (c) buzzer (d) potentiometer
31. 31.True or false: a potentiometer is a resistance knob. (a) True (b) False
32. 32.True or false: a diode lets current go one way. (a) True (b) False
33. 33.🧩 Which component smooths a wobbly supply? (a) transistor (b) LDR (c) capacitor (d) LED
34. 34.True or false: a motor makes things spin. (a) False (b) True
35. 35.What does a fuse do? (a) has coloured bands (b) stores a little charge (c) glows using little power (d) blows if current is high
36. 36.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
37. 37.What does an LED do? (a) stores a little charge (b) glows using little power (c) boosts a small signal (d) smooths a wobbly supply
38. 38.What does a resistor do? (a) stores a little charge (b) turns a fan or wheels (c) limits the current (d) glows using little power
39. 39.True or false: a capacitor glows using little power. (a) False (b) True
40. 40.True or false: a fuse senses how bright it is. (a) False (b) True

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