Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 314 · 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) a resistor (b) an LED (c) a fuse (d) a motor
2. 2.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) is a resistance knob (d) limits the current
3. 3.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) potentiometer (d) motor
4. 4.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) capacitor (d) diode
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
6. 6.What does a motor do? (a) lets current go one way (b) senses how hot it is (c) stores a little charge (d) turns a fan or wheels
7. 7.🧩 Which component senses how bright it is? (a) resistor (b) motor (c) LDR (d) thermistor
8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
9. 9.🧩 Which component glows using little power? (a) diode (b) potentiometer (c) resistor (d) LED
10. 10.True or false: a capacitor is a resistance knob. (a) False (b) True
11. 11.What does a capacitor do? (a) limits the current (b) senses how bright it is (c) stores a little charge (d) makes a beeping sound
12. 12.True or false: a motor blows if current is high. (a) False (b) True
13. 13.What does a resistor do? (a) stores a little charge (b) glows using little power (c) has coloured bands (d) smooths a wobbly supply
14. 14.🧩 Which component limits the current? (a) motor (b) LDR (c) resistor (d) potentiometer
15. 15.What does a fuse do? (a) turns a fan or wheels (b) has coloured bands (c) blows if current is high (d) lets current go one way
16. 16.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) fuse (d) thermistor
17. 17.🧩 Which component makes things spin? (a) buzzer (b) capacitor (c) transistor (d) motor
18. 18.🧩 Which component has coloured bands? (a) diode (b) LDR (c) resistor (d) thermistor
19. 19.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) transistor (d) buzzer
20. 20.🧩 Which component turns a fan or wheels? (a) diode (b) LED (c) capacitor (d) motor
21. 21.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) limits the current (d) has coloured bands
22. 22.True or false: an LED lets current go one way. (a) True (b) False
23. 23.True or false: a diode limits the current. (a) False (b) True
24. 24.True or false: a transistor boosts a small signal. (a) True (b) False
25. 25.🧩 Which component stores a little charge? (a) thermistor (b) resistor (c) capacitor (d) fuse
26. 26.True or false: a fuse is a resistance knob. (a) False (b) True
27. 27.🧩 Which component boosts a small signal? (a) potentiometer (b) capacitor (c) transistor (d) fuse
28. 28.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) LDR (d) resistor
29. 29.True or false: a potentiometer boosts a small signal. (a) True (b) False
30. 30.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) turns a fan or wheels (d) glows using little power
31. 31.What does a thermistor do? (a) has coloured bands (b) senses how hot it is (c) beeps for an alarm (d) smooths a wobbly supply
32. 32.What does a capacitor do? (a) makes things spin (b) turns a fan or wheels (c) is a resistance knob (d) smooths a wobbly supply
33. 33.🧩 Which component blows if current is high? (a) capacitor (b) transistor (c) resistor (d) fuse
34. 34.🧩 Which component beeps for an alarm? (a) capacitor (b) potentiometer (c) buzzer (d) LED
35. 35.True or false: a buzzer beeps for an alarm. (a) False (b) True
36. 36.True or false: a motor boosts a small signal. (a) True (b) False
37. 37.True or false: an LDR turns a fan or wheels. (a) True (b) False
38. 38.What does a diode do? (a) senses how hot it is (b) is a resistance knob (c) boosts a small signal (d) lets current go one way
39. 39.What does a buzzer do? (a) senses how hot it is (b) turns a fan or wheels (c) has coloured bands (d) beeps for an alarm
40. 40.True or false: a thermistor senses how bright it is. (a) True (b) False

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