Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 154 · 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 part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
3. 3.🧩 Which component stores a little charge? (a) resistor (b) transistor (c) capacitor (d) buzzer
4. 4.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
5. 5.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) transistor (d) fuse
6. 6.What does a transistor do? (a) limits the current (b) turns a fan or wheels (c) smooths a wobbly supply (d) boosts a small signal
7. 7.🧩 Which component limits the current? (a) resistor (b) fuse (c) potentiometer (d) buzzer
8. 8.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) is a resistance knob (d) limits the current
9. 9.🧩 Which component blows if current is high? (a) fuse (b) buzzer (c) resistor (d) thermistor
10. 10.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) beeps for an alarm (d) turns a fan or wheels
11. 11.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
12. 12.🧩 Which component senses how hot it is? (a) buzzer (b) potentiometer (c) transistor (d) thermistor
13. 13.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) capacitor (d) LED
14. 14.🧩 Which component smooths a wobbly supply? (a) LED (b) motor (c) capacitor (d) diode
15. 15.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) has coloured bands (d) smooths a wobbly supply
16. 16.True or false: a capacitor senses how hot it is. (a) True (b) False
17. 17.True or false: a motor makes things spin. (a) False (b) True
18. 18.What does an LED do? (a) stores a little charge (b) glows using little power (c) has coloured bands (d) makes a beeping sound
19. 19.What does a resistor do? (a) makes a beeping sound (b) stores a little charge (c) beeps for an alarm (d) limits the current
20. 20.True or false: a buzzer beeps for an alarm. (a) False (b) True
21. 21.True or false: a potentiometer is a resistance knob. (a) True (b) False
22. 22.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) motor (d) LDR
23. 23.True or false: a resistor has coloured bands. (a) True (b) False
24. 24.True or false: a resistor limits the current. (a) False (b) True
25. 25.What does a fuse do? (a) has coloured bands (b) smooths a wobbly supply (c) blows if current is high (d) beeps for an alarm
26. 26.🧩 Which component glows using little power? (a) transistor (b) LED (c) thermistor (d) buzzer
27. 27.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) turns a fan or wheels (d) stores a little charge
28. 28.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) glows using little power (d) makes a beeping sound
29. 29.What does an LDR do? (a) stores a little charge (b) glows using little power (c) makes a beeping sound (d) senses how bright it is
30. 30.What does a diode do? (a) limits the current (b) lets current go one way (c) boosts a small signal (d) glows using little power
31. 31.True or false: a motor smooths a wobbly supply. (a) False (b) True
32. 32.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) transistor (d) potentiometer
33. 33.What does a buzzer do? (a) senses how hot it is (b) turns a fan or wheels (c) beeps for an alarm (d) boosts a small signal
34. 34.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) diode (d) potentiometer
35. 35.🧩 Which component beeps for an alarm? (a) capacitor (b) transistor (c) motor (d) buzzer
36. 36.True or false: an LED glows using little power. (a) False (b) True
37. 37.True or false: a fuse has coloured bands. (a) False (b) True
38. 38.True or false: an LDR senses how hot it is. (a) True (b) False
39. 39.🧩 Which component has coloured bands? (a) LED (b) LDR (c) fuse (d) resistor
40. 40.True or false: an LDR senses how bright it is. (a) False (b) True

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