Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 75 · 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 sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
2. 2.True or false: an LDR has coloured bands. (a) False (b) True
3. 3.What does an LDR do? (a) senses how bright it is (b) turns a fan or wheels (c) lets current go one way (d) stores a little charge
4. 4.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) LDR (d) thermistor
5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
6. 6.True or false: a capacitor has coloured bands. (a) False (b) True
7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
8. 8.True or false: an LED glows using little power. (a) False (b) True
9. 9.True or false: a capacitor stores a little charge. (a) False (b) True
10. 10.🧩 Which component turns a fan or wheels? (a) thermistor (b) transistor (c) LDR (d) motor
11. 11.🧩 Which component beeps for an alarm? (a) resistor (b) LED (c) buzzer (d) transistor
12. 12.🧩 Which component boosts a small signal? (a) diode (b) resistor (c) transistor (d) potentiometer
13. 13.What does a motor do? (a) stores a little charge (b) lets current go one way (c) turns a fan or wheels (d) blows if current is high
14. 14.True or false: a resistor limits the current. (a) False (b) True
15. 15.True or false: a diode makes a beeping sound. (a) False (b) True
16. 16.🧩 Which component makes things spin? (a) potentiometer (b) transistor (c) motor (d) resistor
17. 17.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) resistor (d) transistor
18. 18.🧩 Which component blows if current is high? (a) capacitor (b) diode (c) fuse (d) LDR
19. 19.True or false: an LDR beeps for an alarm. (a) True (b) False
20. 20.True or false: a thermistor senses how hot it is. (a) True (b) False
21. 21.True or false: a motor has coloured bands. (a) True (b) False
22. 22.🧩 Which component senses how hot it is? (a) diode (b) resistor (c) fuse (d) thermistor
23. 23.True or false: a motor turns a fan or wheels. (a) False (b) True
24. 24.🧩 Which component is a resistance knob? (a) resistor (b) transistor (c) potentiometer (d) buzzer
25. 25.What does a transistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
26. 26.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
27. 27.🧩 Which component stores a little charge? (a) buzzer (b) motor (c) capacitor (d) diode
28. 28.What does a buzzer do? (a) limits the current (b) has coloured bands (c) makes a beeping sound (d) senses how bright it is
29. 29.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) has coloured bands (d) glows using little power
30. 30.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) makes a beeping sound (d) has coloured bands
31. 31.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) glows using little power (d) limits the current
32. 32.True or false: a fuse blows if current is high. (a) False (b) True
33. 33.What does an LED do? (a) limits the current (b) is a resistance knob (c) stores a little charge (d) glows using little power
34. 34.🧩 Which component glows using little power? (a) transistor (b) LED (c) LDR (d) potentiometer
35. 35.What does a resistor do? (a) glows using little power (b) beeps for an alarm (c) limits the current (d) is a resistance knob
36. 36.True or false: a motor blows if current is high. (a) True (b) False
37. 37.🧩 Which component makes a beeping sound? (a) potentiometer (b) diode (c) buzzer (d) motor
38. 38.True or false: a potentiometer stores a little charge. (a) False (b) True
39. 39.True or false: a thermistor stores a little charge. (a) True (b) False
40. 40.What does a diode do? (a) makes a beeping sound (b) glows using little power (c) beeps for an alarm (d) lets current go one way

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