Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 221 · 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 component is a resistance knob? (a) resistor (b) thermistor (c) potentiometer (d) capacitor
2. 2.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) resistor (d) fuse
3. 3.🧩 Which component smooths a wobbly supply? (a) diode (b) buzzer (c) LED (d) capacitor
4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
5. 5.What does a fuse do? (a) senses how bright it is (b) makes a beeping sound (c) limits the current (d) blows if current is high
6. 6.True or false: a transistor beeps for an alarm. (a) False (b) True
7. 7.What does a motor do? (a) beeps for an alarm (b) senses how hot it is (c) makes things spin (d) lets current go one way
8. 8.What does a motor do? (a) beeps for an alarm (b) is a resistance knob (c) boosts a small signal (d) turns a fan or wheels
9. 9.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) motor (d) fuse
10. 10.True or false: a motor makes a beeping sound. (a) True (b) False
11. 11.True or false: a fuse makes things spin. (a) False (b) True
12. 12.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) smooths a wobbly supply (d) stores a little charge
13. 13.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
14. 14.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
15. 15.What does an LDR do? (a) limits the current (b) senses how bright it is (c) smooths a wobbly supply (d) boosts a small signal
16. 16.🧩 Which component has coloured bands? (a) LED (b) resistor (c) transistor (d) thermistor
17. 17.True or false: a buzzer beeps for an alarm. (a) True (b) False
18. 18.🧩 Which component glows using little power? (a) resistor (b) fuse (c) motor (d) LED
19. 19.True or false: a thermistor senses how hot it is. (a) False (b) True
20. 20.🧩 Which component makes a beeping sound? (a) motor (b) resistor (c) buzzer (d) capacitor
21. 21.True or false: an LDR blows if current is high. (a) False (b) True
22. 22.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) turns a fan or wheels (d) senses how hot it is
23. 23.What does an LED do? (a) makes things spin (b) lets current go one way (c) glows using little power (d) senses how hot it is
24. 24.True or false: a transistor makes a beeping sound. (a) False (b) True
25. 25.True or false: a motor turns a fan or wheels. (a) True (b) False
26. 26.🧩 Which component blows if current is high? (a) motor (b) transistor (c) capacitor (d) fuse
27. 27.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
28. 28.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) senses how bright it is (d) has coloured bands
29. 29.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
30. 30.True or false: a fuse makes a beeping sound. (a) True (b) False
31. 31.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) fuse (d) potentiometer
32. 32.What does a potentiometer do? (a) glows using little power (b) makes things spin (c) makes a beeping sound (d) is a resistance knob
33. 33.True or false: a buzzer makes a beeping sound. (a) False (b) True
34. 34.🧩 Which component limits the current? (a) transistor (b) LDR (c) resistor (d) capacitor
35. 35.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) buzzer (d) diode
36. 36.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) boosts a small signal (d) turns a fan or wheels
37. 37.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
38. 38.🧩 Which component turns a fan or wheels? (a) capacitor (b) fuse (c) potentiometer (d) motor
39. 39.🧩 Which component senses how bright it is? (a) fuse (b) resistor (c) buzzer (d) LDR
40. 40.What does a capacitor do? (a) beeps for an alarm (b) makes a beeping sound (c) senses how bright it is (d) stores a little charge

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