Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 282 · 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.What does an LDR do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) blows if current is high
2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
3. 3.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) capacitor (d) diode
4. 4.True or false: a capacitor stores a little charge. (a) False (b) True
5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
6. 6.True or false: a potentiometer glows using little power. (a) True (b) False
7. 7.What does an LED do? (a) has coloured bands (b) limits the current (c) lets current go one way (d) glows using little power
8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
9. 9.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) LDR (d) buzzer
10. 10.What does a buzzer do? (a) smooths a wobbly supply (b) makes things spin (c) senses how bright it is (d) makes a beeping sound
11. 11.What does a motor do? (a) is a resistance knob (b) blows if current is high (c) smooths a wobbly supply (d) makes things spin
12. 12.🧩 Which component has coloured bands? (a) fuse (b) buzzer (c) resistor (d) transistor
13. 13.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) limits the current
14. 14.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) stores a little charge (d) beeps for an alarm
15. 15.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) senses how bright it is (d) is a resistance knob
16. 16.True or false: a fuse has coloured bands. (a) False (b) True
17. 17.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) motor (d) capacitor
18. 18.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) turns a fan or wheels (d) boosts a small signal
19. 19.True or false: a capacitor makes a beeping sound. (a) True (b) False
20. 20.True or false: an LDR glows using little power. (a) True (b) False
21. 21.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) LDR (d) diode
22. 22.What does a capacitor do? (a) turns a fan or wheels (b) beeps for an alarm (c) smooths a wobbly supply (d) is a resistance knob
23. 23.🧩 Which component senses how hot it is? (a) capacitor (b) diode (c) thermistor (d) transistor
24. 24.What does a buzzer do? (a) limits the current (b) blows if current is high (c) senses how hot it is (d) beeps for an alarm
25. 25.🧩 Which component lets current go one way? (a) diode (b) LED (c) thermistor (d) potentiometer
26. 26.What does a resistor do? (a) lets current go one way (b) makes a beeping sound (c) has coloured bands (d) glows using little power
27. 27.True or false: an LED glows using little power. (a) False (b) True
28. 28.True or false: an LED senses how hot it is. (a) True (b) False
29. 29.What does a diode do? (a) makes things spin (b) lets current go one way (c) turns a fan or wheels (d) senses how hot it is
30. 30.🧩 Which component senses how bright it is? (a) thermistor (b) resistor (c) LDR (d) LED
31. 31.True or false: a resistor senses how bright it is. (a) True (b) False
32. 32.🧩 Which component makes a beeping sound? (a) resistor (b) motor (c) thermistor (d) buzzer
33. 33.True or false: a transistor boosts a small signal. (a) True (b) False
34. 34.What does a fuse do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) limits the current
35. 35.True or false: a transistor senses how bright it is. (a) False (b) True
36. 36.True or false: an LDR smooths a wobbly supply. (a) True (b) False
37. 37.True or false: an LED limits the current. (a) True (b) False
38. 38.True or false: a capacitor senses how bright it is. (a) True (b) False
39. 39.🧩 Which component limits the current? (a) resistor (b) motor (c) LED (d) transistor
40. 40.True or false: a diode makes things spin. (a) True (b) False

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