Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 558 · 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.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
2. 2.What does a diode do? (a) blows if current is high (b) limits the current (c) lets current go one way (d) makes things spin
3. 3.What does an LDR do? (a) lets current go one way (b) has coloured bands (c) smooths a wobbly supply (d) senses how bright it is
4. 4.What does an LED do? (a) stores a little charge (b) blows if current is high (c) glows using little power (d) smooths a wobbly supply
5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
6. 6.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) capacitor (d) LED
7. 7.🧩 Which component limits the current? (a) LDR (b) resistor (c) transistor (d) capacitor
8. 8.🧩 Which component turns a fan or wheels? (a) thermistor (b) capacitor (c) LDR (d) motor
9. 9.🧩 Which component senses how bright it is? (a) fuse (b) thermistor (c) diode (d) LDR
10. 10.True or false: a resistor senses how bright it is. (a) False (b) True
11. 11.What does a resistor do? (a) boosts a small signal (b) stores a little charge (c) glows using little power (d) limits the current
12. 12.True or false: a transistor limits the current. (a) False (b) True
13. 13.🧩 Which component beeps for an alarm? (a) thermistor (b) buzzer (c) fuse (d) motor
14. 14.What does a thermistor do? (a) is a resistance knob (b) has coloured bands (c) senses how hot it is (d) boosts a small signal
15. 15.True or false: a fuse limits the current. (a) False (b) True
16. 16.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
17. 17.🧩 Which component makes things spin? (a) potentiometer (b) diode (c) transistor (d) motor
18. 18.True or false: a capacitor stores a little charge. (a) False (b) True
19. 19.True or false: a resistor is a resistance knob. (a) False (b) True
20. 20.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) lets current go one way (d) stores a little charge
21. 21.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) fuse (d) LDR
22. 22.True or false: a thermistor senses how hot it is. (a) True (b) False
23. 23.True or false: a resistor turns a fan or wheels. (a) False (b) True
24. 24.What does a buzzer do? (a) stores a little charge (b) smooths a wobbly supply (c) glows using little power (d) makes a beeping sound
25. 25.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
26. 26.🧩 Which component glows using little power? (a) LED (b) capacitor (c) resistor (d) buzzer
27. 27.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) transistor (d) potentiometer
28. 28.What does a capacitor do? (a) has coloured bands (b) senses how bright it is (c) beeps for an alarm (d) stores a little charge
29. 29.What does a potentiometer do? (a) turns a fan or wheels (b) boosts a small signal (c) is a resistance knob (d) lets current go one way
30. 30.True or false: an LED glows using little power. (a) True (b) False
31. 31.🧩 Which component makes a beeping sound? (a) potentiometer (b) motor (c) capacitor (d) buzzer
32. 32.True or false: a transistor boosts a small signal. (a) True (b) False
33. 33.True or false: a transistor glows using little power. (a) False (b) True
34. 34.True or false: a diode senses how hot it is. (a) True (b) False
35. 35.True or false: a thermistor limits the current. (a) True (b) False
36. 36.What does a capacitor do? (a) limits the current (b) boosts a small signal (c) makes things spin (d) smooths a wobbly supply
37. 37.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) turns a fan or wheels (d) lets current go one way
38. 38.🧩 Which component blows if current is high? (a) fuse (b) buzzer (c) motor (d) transistor
39. 39.True or false: a potentiometer is a resistance knob. (a) True (b) False
40. 40.🧩 Which component stores a little charge? (a) buzzer (b) motor (c) transistor (d) capacitor

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