Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 151 · 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 limits the current? (a) transistor (b) LED (c) resistor (d) LDR
2. 2.🧩 Which component makes a beeping sound? (a) potentiometer (b) diode (c) LED (d) buzzer
3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
4. 4.What does a potentiometer do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) is a resistance knob
5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
6. 6.🧩 Which component senses how bright it is? (a) motor (b) diode (c) capacitor (d) LDR
7. 7.What does a buzzer do? (a) glows using little power (b) senses how hot it is (c) beeps for an alarm (d) turns a fan or wheels
8. 8.🧩 Which component glows using little power? (a) transistor (b) LDR (c) capacitor (d) LED
9. 9.True or false: an LDR senses how bright it is. (a) False (b) True
10. 10.🧩 Which component senses how hot it is? (a) LDR (b) fuse (c) thermistor (d) capacitor
11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
12. 12.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) motor (d) LDR
13. 13.What does an LED do? (a) limits the current (b) glows using little power (c) blows if current is high (d) senses how bright it is
14. 14.🧩 Which component blows if current is high? (a) diode (b) fuse (c) LDR (d) LED
15. 15.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
17. 17.True or false: a resistor makes a beeping sound. (a) False (b) True
18. 18.What does a resistor do? (a) beeps for an alarm (b) is a resistance knob (c) makes a beeping sound (d) limits the current
19. 19.True or false: a buzzer lets current go one way. (a) True (b) False
20. 20.True or false: a capacitor stores a little charge. (a) True (b) False
21. 21.What does a transistor do? (a) lets current go one way (b) limits the current (c) is a resistance knob (d) boosts a small signal
22. 22.True or false: a motor limits the current. (a) True (b) False
23. 23.True or false: a buzzer is a resistance knob. (a) False (b) True
24. 24.🧩 Which component lets current go one way? (a) transistor (b) diode (c) capacitor (d) LDR
25. 25.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) resistor (d) transistor
26. 26.What does a resistor do? (a) glows using little power (b) blows if current is high (c) has coloured bands (d) turns a fan or wheels
27. 27.True or false: a motor has coloured bands. (a) True (b) False
28. 28.True or false: a resistor limits the current. (a) True (b) False
29. 29.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) boosts a small signal (d) is a resistance knob
30. 30.What does an LDR do? (a) makes a beeping sound (b) boosts a small signal (c) turns a fan or wheels (d) senses how bright it is
31. 31.True or false: an LED senses how hot it is. (a) False (b) True
32. 32.🧩 Which component boosts a small signal? (a) diode (b) capacitor (c) LED (d) transistor
33. 33.🧩 Which component smooths a wobbly supply? (a) resistor (b) LED (c) capacitor (d) potentiometer
34. 34.🧩 Which component is a resistance knob? (a) LED (b) resistor (c) potentiometer (d) thermistor
35. 35.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) capacitor (d) diode
36. 36.True or false: a fuse blows if current is high. (a) False (b) True
37. 37.What does a buzzer do? (a) makes a beeping sound (b) makes things spin (c) is a resistance knob (d) turns a fan or wheels
38. 38.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
39. 39.🧩 Which component stores a little charge? (a) thermistor (b) diode (c) buzzer (d) capacitor
40. 40.True or false: an LDR lets current go one way. (a) True (b) False

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