Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 563 · 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) an LED (b) a fuse (c) a resistor (d) a motor
2. 2.True or false: a buzzer turns a fan or wheels. (a) False (b) True
3. 3.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
4. 4.🧩 Which component has coloured bands? (a) LED (b) resistor (c) capacitor (d) buzzer
5. 5.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) capacitor (d) transistor
6. 6.What does an LDR do? (a) blows if current is high (b) limits the current (c) senses how bright it is (d) stores a little charge
7. 7.🧩 Which component senses how hot it is? (a) resistor (b) transistor (c) thermistor (d) LDR
8. 8.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
9. 9.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
10. 10.What does a transistor do? (a) beeps for an alarm (b) stores a little charge (c) makes things spin (d) boosts a small signal
11. 11.🧩 Which component smooths a wobbly supply? (a) motor (b) transistor (c) capacitor (d) buzzer
12. 12.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) makes a beeping sound (d) turns a fan or wheels
13. 13.True or false: a resistor smooths a wobbly supply. (a) True (b) False
14. 14.What does a capacitor do? (a) makes things spin (b) limits the current (c) smooths a wobbly supply (d) is a resistance knob
15. 15.What does a thermistor do? (a) turns a fan or wheels (b) has coloured bands (c) senses how hot it is (d) beeps for an alarm
16. 16.What does a resistor do? (a) stores a little charge (b) makes things spin (c) senses how bright it is (d) limits the current
17. 17.🧩 Which component stores a little charge? (a) resistor (b) potentiometer (c) capacitor (d) LED
18. 18.What does a potentiometer do? (a) beeps for an alarm (b) senses how hot it is (c) is a resistance knob (d) senses how bright it is
19. 19.What does a diode do? (a) blows if current is high (b) has coloured bands (c) senses how bright it is (d) lets current go one way
20. 20.True or false: a fuse lets current go one way. (a) False (b) True
21. 21.True or false: a capacitor stores a little charge. (a) True (b) False
22. 22.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) capacitor (d) diode
23. 23.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) fuse (d) LDR
24. 24.True or false: a motor makes things spin. (a) False (b) True
25. 25.🧩 Which component limits the current? (a) LED (b) potentiometer (c) resistor (d) capacitor
26. 26.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) limits the current (d) senses how hot it is
27. 27.What does a buzzer do? (a) beeps for an alarm (b) makes things spin (c) smooths a wobbly supply (d) is a resistance knob
28. 28.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) capacitor (d) fuse
29. 29.🧩 Which component glows using little power? (a) LED (b) buzzer (c) thermistor (d) capacitor
30. 30.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) resistor (d) buzzer
31. 31.What does a resistor do? (a) makes a beeping sound (b) has coloured bands (c) boosts a small signal (d) smooths a wobbly supply
32. 32.True or false: a buzzer makes a beeping sound. (a) False (b) True
33. 33.True or false: a fuse senses how bright it is. (a) False (b) True
34. 34.True or false: a buzzer beeps for an alarm. (a) True (b) False
35. 35.True or false: a capacitor lets current go one way. (a) False (b) True
36. 36.True or false: an LED glows using little power. (a) True (b) False
37. 37.True or false: a buzzer senses how bright it is. (a) True (b) False
38. 38.What does a motor do? (a) is a resistance knob (b) lets current go one way (c) blows if current is high (d) turns a fan or wheels
39. 39.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) LED (d) potentiometer
40. 40.🧩 Which component senses how bright it is? (a) thermistor (b) capacitor (c) LDR (d) buzzer

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