Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 397 · 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 motor (c) a resistor (d) a fuse
2. 2.What does an LED do? (a) limits the current (b) turns a fan or wheels (c) senses how hot it is (d) glows using little power
3. 3.What does a buzzer do? (a) senses how bright it is (b) makes things spin (c) makes a beeping sound (d) limits the current
4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
5. 5.🧩 Which component stores a little charge? (a) LED (b) transistor (c) capacitor (d) fuse
6. 6.🧩 Which component smooths a wobbly supply? (a) resistor (b) thermistor (c) capacitor (d) LED
7. 7.True or false: a fuse is a resistance knob. (a) True (b) False
8. 8.What does a diode do? (a) turns a fan or wheels (b) stores a little charge (c) lets current go one way (d) beeps for an alarm
9. 9.True or false: a resistor has coloured bands. (a) False (b) True
10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
11. 11.What does a transistor do? (a) has coloured bands (b) senses how hot it is (c) turns a fan or wheels (d) boosts a small signal
12. 12.🧩 Which component turns a fan or wheels? (a) transistor (b) capacitor (c) motor (d) LED
13. 13.True or false: a resistor limits the current. (a) False (b) True
14. 14.🧩 Which component limits the current? (a) buzzer (b) LDR (c) diode (d) resistor
15. 15.🧩 Which component makes things spin? (a) fuse (b) LED (c) motor (d) LDR
16. 16.🧩 Which component beeps for an alarm? (a) thermistor (b) resistor (c) motor (d) buzzer
17. 17.What does a buzzer do? (a) makes things spin (b) senses how hot it is (c) beeps for an alarm (d) is a resistance knob
18. 18.🧩 Which component glows using little power? (a) transistor (b) motor (c) LED (d) LDR
19. 19.True or false: a resistor blows if current is high. (a) False (b) True
20. 20.True or false: a diode glows using little power. (a) False (b) True
21. 21.True or false: a fuse lets current go one way. (a) True (b) False
22. 22.🧩 Which component lets current go one way? (a) potentiometer (b) transistor (c) capacitor (d) diode
23. 23.🧩 Which component blows if current is high? (a) buzzer (b) LED (c) resistor (d) fuse
24. 24.What does a potentiometer do? (a) makes things spin (b) smooths a wobbly supply (c) stores a little charge (d) is a resistance knob
25. 25.🧩 Which component is a resistance knob? (a) motor (b) transistor (c) potentiometer (d) buzzer
26. 26.🧩 Which component boosts a small signal? (a) capacitor (b) motor (c) transistor (d) buzzer
27. 27.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) fuse (d) capacitor
28. 28.🧩 Which component senses how bright it is? (a) resistor (b) diode (c) LED (d) LDR
29. 29.What does a thermistor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) senses how hot it is (d) stores a little charge
30. 30.What does an LDR do? (a) smooths a wobbly supply (b) limits the current (c) senses how bright it is (d) beeps for an alarm
31. 31.What does a capacitor do? (a) is a resistance knob (b) stores a little charge (c) beeps for an alarm (d) limits the current
32. 32.True or false: an LED stores a little charge. (a) True (b) False
33. 33.🧩 Which component has coloured bands? (a) motor (b) resistor (c) capacitor (d) potentiometer
34. 34.What does a resistor do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) makes a beeping sound
35. 35.True or false: a diode has coloured bands. (a) False (b) True
36. 36.True or false: a buzzer turns a fan or wheels. (a) True (b) False
37. 37.True or false: a diode senses how bright it is. (a) True (b) False
38. 38.True or false: a diode smooths a wobbly supply. (a) False (b) True
39. 39.What does a capacitor do? (a) limits the current (b) smooths a wobbly supply (c) has coloured bands (d) senses how hot it is
40. 40.True or false: a motor blows if current is high. (a) True (b) False

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