Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 101 · 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 capacitor (d) a buzzer
2. 2.What does a resistor do? (a) senses how bright it is (b) beeps for an alarm (c) limits the current (d) is a resistance knob
3. 3.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) is a resistance knob (d) lets current go one way
4. 4.True or false: a buzzer boosts a small signal. (a) False (b) True
5. 5.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) senses how bright it is (d) makes things spin
6. 6.🧩 Which component stores a little charge? (a) motor (b) LED (c) resistor (d) capacitor
7. 7.🧩 Which component limits the current? (a) diode (b) fuse (c) resistor (d) motor
8. 8.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) potentiometer (d) buzzer
9. 9.What does an LDR do? (a) is a resistance knob (b) lets current go one way (c) senses how bright it is (d) stores a little charge
10. 10.🧩 Which component makes things spin? (a) thermistor (b) motor (c) buzzer (d) resistor
11. 11.True or false: a resistor limits the current. (a) False (b) True
12. 12.🧩 Which component beeps for an alarm? (a) capacitor (b) LED (c) buzzer (d) potentiometer
13. 13.True or false: a thermistor blows if current is high. (a) True (b) False
14. 14.🧩 Which component smooths a wobbly supply? (a) resistor (b) potentiometer (c) capacitor (d) buzzer
15. 15.🧩 Which component lets current go one way? (a) transistor (b) resistor (c) diode (d) fuse
16. 16.True or false: a fuse smooths a wobbly supply. (a) True (b) False
17. 17.True or false: a transistor limits the current. (a) False (b) True
18. 18.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
19. 19.🧩 Which component senses how hot it is? (a) resistor (b) buzzer (c) thermistor (d) LDR
20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
21. 21.🧩 Which component blows if current is high? (a) buzzer (b) LED (c) resistor (d) fuse
22. 22.True or false: a diode is a resistance knob. (a) True (b) False
23. 23.True or false: a buzzer beeps for an alarm. (a) False (b) True
24. 24.True or false: an LED beeps for an alarm. (a) True (b) False
25. 25.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) makes things spin (d) boosts a small signal
26. 26.True or false: a resistor has coloured bands. (a) False (b) True
27. 27.True or false: a motor is a resistance knob. (a) False (b) True
28. 28.🧩 Which component senses how bright it is? (a) motor (b) resistor (c) thermistor (d) LDR
29. 29.What does a motor do? (a) boosts a small signal (b) has coloured bands (c) lets current go one way (d) makes things spin
30. 30.True or false: an LED makes things spin. (a) True (b) False
31. 31.What does a capacitor do? (a) senses how bright it is (b) has coloured bands (c) stores a little charge (d) lets current go one way
32. 32.🧩 Which component glows using little power? (a) LED (b) buzzer (c) transistor (d) thermistor
33. 33.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) senses how bright it is (d) smooths a wobbly supply
34. 34.What does a capacitor do? (a) beeps for an alarm (b) lets current go one way (c) smooths a wobbly supply (d) limits the current
35. 35.What does a motor do? (a) glows using little power (b) senses how hot it is (c) turns a fan or wheels (d) limits the current
36. 36.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) makes things spin (d) blows if current is high
37. 37.True or false: a transistor boosts a small signal. (a) False (b) True
38. 38.What does a transistor do? (a) turns a fan or wheels (b) limits the current (c) boosts a small signal (d) is a resistance knob
39. 39.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
40. 40.True or false: a transistor senses how hot it is. (a) True (b) False

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