Electronics Worksheet: Electronic Components

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

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