Electronics Worksheet: Electronic Components

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

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