Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 409 · 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 diode (b) a capacitor (c) a resistor (d) a buzzer
2. 2.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) turns a fan or wheels (d) blows if current is high
3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
4. 4.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) lets current go one way (d) senses how bright it is
5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
6. 6.True or false: an LED glows using little power. (a) True (b) False
7. 7.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) makes things spin (d) stores a little charge
8. 8.🧩 Which component senses how hot it is? (a) fuse (b) potentiometer (c) LDR (d) thermistor
9. 9.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
10. 10.True or false: a motor makes a beeping sound. (a) False (b) True
11. 11.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) resistor (d) diode
12. 12.🧩 Which component limits the current? (a) transistor (b) fuse (c) resistor (d) motor
13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
14. 14.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) resistor (d) transistor
15. 15.🧩 Which component makes a beeping sound? (a) motor (b) fuse (c) potentiometer (d) buzzer
16. 16.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) makes things spin (d) has coloured bands
17. 17.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) is a resistance knob (d) makes a beeping sound
18. 18.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) motor (d) diode
19. 19.🧩 Which component stores a little charge? (a) potentiometer (b) resistor (c) capacitor (d) transistor
20. 20.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) turns a fan or wheels (d) limits the current
21. 21.True or false: a resistor turns a fan or wheels. (a) False (b) True
22. 22.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) boosts a small signal (d) lets current go one way
23. 23.What does an LED do? (a) senses how bright it is (b) is a resistance knob (c) senses how hot it is (d) glows using little power
24. 24.True or false: a buzzer stores a little charge. (a) False (b) True
25. 25.True or false: a fuse limits the current. (a) True (b) False
26. 26.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) turns a fan or wheels (d) has coloured bands
27. 27.True or false: an LED blows if current is high. (a) True (b) False
28. 28.🧩 Which component beeps for an alarm? (a) motor (b) resistor (c) fuse (d) buzzer
29. 29.True or false: a motor turns a fan or wheels. (a) True (b) False
30. 30.True or false: a diode lets current go one way. (a) False (b) True
31. 31.True or false: a diode makes a beeping sound. (a) False (b) True
32. 32.🧩 Which component glows using little power? (a) capacitor (b) buzzer (c) potentiometer (d) LED
33. 33.What does a motor do? (a) boosts a small signal (b) beeps for an alarm (c) smooths a wobbly supply (d) turns a fan or wheels
34. 34.🧩 Which component blows if current is high? (a) LED (b) diode (c) thermistor (d) fuse
35. 35.True or false: a resistor is a resistance knob. (a) True (b) False
36. 36.True or false: a potentiometer senses how bright it is. (a) False (b) True
37. 37.🧩 Which component boosts a small signal? (a) thermistor (b) LDR (c) transistor (d) fuse
38. 38.What does a thermistor do? (a) turns a fan or wheels (b) beeps for an alarm (c) smooths a wobbly supply (d) senses how hot it is
39. 39.🧩 Which component makes things spin? (a) resistor (b) motor (c) thermistor (d) LDR
40. 40.What does a transistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) limits the current (d) boosts a small signal

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