Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 176 · 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 potentiometer do? (a) lets current go one way (b) blows if current is high (c) is a resistance knob (d) senses how bright it is
2. 2.What does a fuse do? (a) beeps for an alarm (b) makes things spin (c) blows if current is high (d) is a resistance knob
3. 3.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) motor (d) buzzer
4. 4.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
5. 5.True or false: a diode makes a beeping sound. (a) False (b) True
6. 6.True or false: a motor has coloured bands. (a) True (b) False
7. 7.What does an LED do? (a) smooths a wobbly supply (b) senses how bright it is (c) glows using little power (d) stores a little charge
8. 8.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) LDR (d) motor
9. 9.True or false: a thermistor lets current go one way. (a) True (b) False
10. 10.🧩 Which component lets current go one way? (a) LDR (b) diode (c) transistor (d) capacitor
11. 11.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) potentiometer (d) capacitor
12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
13. 13.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) beeps for an alarm (d) makes a beeping sound
14. 14.🧩 Which component makes a beeping sound? (a) capacitor (b) resistor (c) thermistor (d) buzzer
15. 15.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) glows using little power (d) lets current go one way
16. 16.True or false: a thermistor is a resistance knob. (a) True (b) False
17. 17.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
18. 18.True or false: a capacitor has coloured bands. (a) False (b) True
19. 19.True or false: an LED glows using little power. (a) False (b) True
20. 20.True or false: an LDR senses how bright it is. (a) True (b) False
21. 21.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) diode (d) LED
22. 22.🧩 Which component smooths a wobbly supply? (a) thermistor (b) LED (c) fuse (d) capacitor
23. 23.What does a capacitor do? (a) boosts a small signal (b) makes things spin (c) senses how hot it is (d) stores a little charge
24. 24.True or false: a potentiometer makes a beeping sound. (a) True (b) False
25. 25.True or false: a buzzer is a resistance knob. (a) False (b) True
26. 26.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
27. 27.🧩 Which component makes things spin? (a) thermistor (b) capacitor (c) fuse (d) motor
28. 28.True or false: an LED lets current go one way. (a) False (b) True
29. 29.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) boosts a small signal (d) beeps for an alarm
30. 30.What does a transistor do? (a) blows if current is high (b) limits the current (c) is a resistance knob (d) boosts a small signal
31. 31.True or false: an LED senses how bright it is. (a) False (b) True
32. 32.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) potentiometer (d) thermistor
33. 33.True or false: a resistor has coloured bands. (a) True (b) False
34. 34.True or false: a resistor turns a fan or wheels. (a) True (b) False
35. 35.True or false: a motor makes things spin. (a) False (b) True
36. 36.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) glows using little power (d) lets current go one way
37. 37.True or false: a transistor senses how bright it is. (a) False (b) True
38. 38.🧩 Which component limits the current? (a) thermistor (b) resistor (c) transistor (d) buzzer
39. 39.What does a motor do? (a) senses how bright it is (b) blows if current is high (c) boosts a small signal (d) makes things spin
40. 40.What does an LDR do? (a) stores a little charge (b) makes things spin (c) smooths a wobbly supply (d) senses how bright it is

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