Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 688 · 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 resistor (c) a fuse (d) a motor
2. 2.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
4. 4.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) boosts a small signal (d) senses how bright it is
5. 5.🧩 Which component stores a little charge? (a) transistor (b) resistor (c) capacitor (d) LDR
6. 6.What does a transistor do? (a) senses how hot it is (b) lets current go one way (c) senses how bright it is (d) boosts a small signal
7. 7.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) motor (d) LDR
8. 8.🧩 Which component has coloured bands? (a) motor (b) LDR (c) resistor (d) LED
9. 9.🧩 Which component makes things spin? (a) motor (b) capacitor (c) diode (d) buzzer
10. 10.True or false: a thermistor makes things spin. (a) True (b) False
11. 11.What does an LDR do? (a) smooths a wobbly supply (b) lets current go one way (c) is a resistance knob (d) senses how bright it is
12. 12.What does a fuse do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) blows if current is high
13. 13.True or false: a resistor makes things spin. (a) False (b) True
14. 14.🧩 Which component senses how hot it is? (a) diode (b) resistor (c) thermistor (d) potentiometer
15. 15.What does a thermistor do? (a) stores a little charge (b) is a resistance knob (c) senses how hot it is (d) lets current go one way
16. 16.🧩 Which component makes a beeping sound? (a) potentiometer (b) capacitor (c) buzzer (d) transistor
17. 17.True or false: a fuse smooths a wobbly supply. (a) True (b) False
18. 18.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) makes things spin (d) makes a beeping sound
19. 19.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) buzzer (d) potentiometer
20. 20.True or false: a resistor limits the current. (a) True (b) False
21. 21.🧩 Which component lets current go one way? (a) LED (b) potentiometer (c) resistor (d) diode
22. 22.True or false: a fuse blows if current is high. (a) False (b) True
23. 23.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) senses how hot it is (d) blows if current is high
24. 24.True or false: a motor makes things spin. (a) True (b) False
25. 25.True or false: a resistor has coloured bands. (a) False (b) True
26. 26.True or false: a motor has coloured bands. (a) True (b) False
27. 27.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) blows if current is high (d) has coloured bands
28. 28.🧩 Which component beeps for an alarm? (a) transistor (b) LDR (c) buzzer (d) thermistor
29. 29.True or false: a thermistor makes a beeping sound. (a) False (b) True
30. 30.What does an LED do? (a) glows using little power (b) lets current go one way (c) makes a beeping sound (d) limits the current
31. 31.🧩 Which component limits the current? (a) LED (b) capacitor (c) buzzer (d) resistor
32. 32.What does a resistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) has coloured bands (d) is a resistance knob
33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
34. 34.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) diode (d) potentiometer
35. 35.What does a capacitor do? (a) makes a beeping sound (b) beeps for an alarm (c) smooths a wobbly supply (d) blows if current is high
36. 36.🧩 Which component is a resistance knob? (a) fuse (b) capacitor (c) resistor (d) potentiometer
37. 37.What does a motor do? (a) blows if current is high (b) has coloured bands (c) lets current go one way (d) makes things spin
38. 38.What does a buzzer do? (a) smooths a wobbly supply (b) blows if current is high (c) makes things spin (d) makes a beeping sound
39. 39.🧩 Which component glows using little power? (a) transistor (b) LED (c) motor (d) buzzer
40. 40.True or false: a fuse senses how hot it is. (a) True (b) False

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