Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 107 · 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 a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal
2. 2.What does a thermistor do? (a) has coloured bands (b) blows if current is high (c) senses how hot it is (d) makes a beeping sound
3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
4. 4.What does a buzzer do? (a) glows using little power (b) boosts a small signal (c) has coloured bands (d) beeps for an alarm
5. 5.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) has coloured bands (d) limits the current
6. 6.What does an LDR do? (a) senses how bright it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) is a resistance knob
7. 7.True or false: an LDR makes things spin. (a) False (b) True
8. 8.True or false: a transistor limits the current. (a) True (b) False
9. 9.True or false: a motor has coloured bands. (a) False (b) True
10. 10.🧩 Which component has coloured bands? (a) diode (b) potentiometer (c) buzzer (d) resistor
11. 11.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) motor (d) LED
12. 12.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) fuse (d) LED
13. 13.🧩 Which component lets current go one way? (a) resistor (b) LDR (c) diode (d) thermistor
14. 14.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) resistor (d) transistor
15. 15.True or false: a fuse blows if current is high. (a) False (b) True
16. 16.What does a resistor do? (a) boosts a small signal (b) senses how bright it is (c) turns a fan or wheels (d) has coloured bands
17. 17.True or false: a motor turns a fan or wheels. (a) False (b) True
18. 18.What does an LED do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) senses how hot it is
19. 19.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
20. 20.True or false: a buzzer makes a beeping sound. (a) True (b) False
21. 21.🧩 Which component senses how hot it is? (a) diode (b) potentiometer (c) fuse (d) thermistor
22. 22.True or false: a resistor has coloured bands. (a) False (b) True
23. 23.True or false: a thermistor beeps for an alarm. (a) True (b) False
24. 24.🧩 Which component blows if current is high? (a) diode (b) fuse (c) thermistor (d) transistor
25. 25.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) resistor (d) LDR
26. 26.🧩 Which component limits the current? (a) motor (b) capacitor (c) resistor (d) transistor
27. 27.What does a potentiometer do? (a) has coloured bands (b) glows using little power (c) is a resistance knob (d) senses how bright it is
28. 28.🧩 Which component glows using little power? (a) capacitor (b) LDR (c) LED (d) transistor
29. 29.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) smooths a wobbly supply (d) is a resistance knob
30. 30.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) makes a beeping sound (d) stores a little charge
31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
32. 32.True or false: a buzzer senses how hot it is. (a) False (b) True
33. 33.🧩 Which component stores a little charge? (a) diode (b) thermistor (c) potentiometer (d) capacitor
34. 34.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
35. 35.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) lets current go one way (d) glows using little power
36. 36.True or false: a motor makes things spin. (a) False (b) True
37. 37.True or false: a buzzer turns a fan or wheels. (a) False (b) True
38. 38.What does a buzzer do? (a) is a resistance knob (b) turns a fan or wheels (c) makes a beeping sound (d) makes things spin
39. 39.True or false: a transistor boosts a small signal. (a) False (b) True
40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) capacitor (d) fuse

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