Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 564 · 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: an LDR senses how bright it is. (a) False (b) True
2. 2.True or false: a fuse blows if current is high. (a) True (b) False
3. 3.🧩 Which component makes things spin? (a) transistor (b) capacitor (c) LDR (d) motor
4. 4.🧩 Which component blows if current is high? (a) LED (b) fuse (c) capacitor (d) buzzer
5. 5.True or false: a thermistor senses how hot it is. (a) True (b) False
6. 6.True or false: a motor makes things spin. (a) False (b) True
7. 7.🧩 Which component is a resistance knob? (a) LDR (b) buzzer (c) potentiometer (d) motor
8. 8.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
9. 9.True or false: a potentiometer boosts a small signal. (a) True (b) False
10. 10.What does a potentiometer do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) is a resistance knob
11. 11.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) limits the current (d) blows if current is high
12. 12.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) fuse (d) LED
13. 13.🧩 Which component senses how bright it is? (a) fuse (b) LED (c) LDR (d) capacitor
14. 14.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
15. 15.True or false: an LDR makes a beeping sound. (a) False (b) True
16. 16.What does an LED do? (a) beeps for an alarm (b) stores a little charge (c) glows using little power (d) turns a fan or wheels
17. 17.🧩 Which component turns a fan or wheels? (a) LED (b) buzzer (c) motor (d) resistor
18. 18.True or false: a diode stores a little charge. (a) True (b) False
19. 19.True or false: a transistor is a resistance knob. (a) False (b) True
20. 20.🧩 Which component lets current go one way? (a) LDR (b) potentiometer (c) diode (d) motor
21. 21.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) capacitor (d) thermistor
22. 22.What does a diode do? (a) lets current go one way (b) blows if current is high (c) glows using little power (d) makes a beeping sound
23. 23.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) fuse (d) LED
24. 24.True or false: a fuse limits the current. (a) False (b) True
25. 25.What does a thermistor do? (a) limits the current (b) glows using little power (c) stores a little charge (d) senses how hot it is
26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
27. 27.True or false: a resistor boosts a small signal. (a) False (b) True
28. 28.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) LED (d) buzzer
29. 29.True or false: an LED glows using little power. (a) False (b) True
30. 30.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
31. 31.True or false: a motor turns a fan or wheels. (a) True (b) False
32. 32.True or false: a transistor makes things spin. (a) True (b) False
33. 33.What does a capacitor do? (a) lets current go one way (b) makes things spin (c) turns a fan or wheels (d) smooths a wobbly supply
34. 34.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) stores a little charge (d) makes a beeping sound
35. 35.What does a motor do? (a) lets current go one way (b) boosts a small signal (c) has coloured bands (d) makes things spin
36. 36.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) turns a fan or wheels (d) smooths a wobbly supply
37. 37.True or false: a capacitor blows if current is high. (a) False (b) True
38. 38.True or false: a resistor has coloured bands. (a) False (b) True
39. 39.🧩 Which component limits the current? (a) transistor (b) motor (c) buzzer (d) resistor
40. 40.What does a capacitor do? (a) is a resistance knob (b) boosts a small signal (c) beeps for an alarm (d) stores a little charge

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