Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 188 · 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 component glows using little power? (a) LED (b) diode (c) transistor (d) potentiometer
2. 2.What does a diode do? (a) makes a beeping sound (b) beeps for an alarm (c) lets current go one way (d) boosts a small signal
3. 3.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LDR (c) capacitor (d) motor
4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
6. 6.🧩 Which component lets current go one way? (a) motor (b) transistor (c) diode (d) thermistor
7. 7.🧩 Which component makes things spin? (a) buzzer (b) transistor (c) thermistor (d) motor
8. 8.What does a motor do? (a) is a resistance knob (b) stores a little charge (c) glows using little power (d) turns a fan or wheels
9. 9.True or false: a motor limits the current. (a) False (b) True
10. 10.What does a potentiometer do? (a) smooths a wobbly supply (b) lets current go one way (c) blows if current is high (d) is a resistance knob
11. 11.What does a buzzer do? (a) beeps for an alarm (b) turns a fan or wheels (c) has coloured bands (d) blows if current is high
12. 12.True or false: a resistor boosts a small signal. (a) False (b) True
13. 13.True or false: a buzzer stores a little charge. (a) False (b) True
14. 14.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
15. 15.🧩 Which component has coloured bands? (a) LED (b) thermistor (c) capacitor (d) resistor
16. 16.🧩 Which component beeps for an alarm? (a) thermistor (b) potentiometer (c) buzzer (d) capacitor
17. 17.🧩 Which component senses how bright it is? (a) transistor (b) LED (c) LDR (d) motor
18. 18.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) resistor (d) buzzer
19. 19.True or false: an LED glows using little power. (a) False (b) True
20. 20.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) motor (d) resistor
21. 21.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) stores a little charge (d) is a resistance knob
22. 22.What does an LED do? (a) glows using little power (b) makes things spin (c) senses how hot it is (d) smooths a wobbly supply
23. 23.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) capacitor (d) resistor
24. 24.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) limits the current (d) is a resistance knob
25. 25.True or false: a resistor has coloured bands. (a) False (b) True
26. 26.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) diode (d) fuse
27. 27.True or false: a potentiometer is a resistance knob. (a) False (b) True
28. 28.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) smooths a wobbly supply (d) blows if current is high
29. 29.What does a resistor do? (a) is a resistance knob (b) limits the current (c) beeps for an alarm (d) stores a little charge
30. 30.True or false: a diode is a resistance knob. (a) True (b) False
31. 31.True or false: an LED senses how hot it is. (a) True (b) False
32. 32.What does a capacitor do? (a) is a resistance knob (b) beeps for an alarm (c) smooths a wobbly supply (d) limits the current
33. 33.🧩 Which component blows if current is high? (a) potentiometer (b) resistor (c) thermistor (d) fuse
34. 34.True or false: a potentiometer makes things spin. (a) False (b) True
35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
36. 36.True or false: a buzzer beeps for an alarm. (a) False (b) True
37. 37.True or false: a potentiometer has coloured bands. (a) False (b) True
38. 38.True or false: a fuse blows if current is high. (a) False (b) True
39. 39.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) has coloured bands (d) senses how bright it is
40. 40.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) makes a beeping sound (d) limits the current

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