Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 272 · 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) senses how bright it is (b) turns a fan or wheels (c) boosts a small signal (d) is a resistance knob
2. 2.True or false: a buzzer lets current go one way. (a) True (b) False
3. 3.True or false: a thermistor senses how hot it is. (a) True (b) False
4. 4.True or false: a resistor makes things spin. (a) True (b) False
5. 5.What does a thermistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how bright it is (d) senses how hot it is
6. 6.True or false: a potentiometer beeps for an alarm. (a) False (b) True
7. 7.True or false: a diode turns a fan or wheels. (a) True (b) False
8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
9. 9.True or false: an LDR beeps for an alarm. (a) True (b) False
10. 10.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) motor (d) capacitor
11. 11.What does an LDR do? (a) makes things spin (b) senses how bright it is (c) blows if current is high (d) boosts a small signal
12. 12.🧩 Which component limits the current? (a) transistor (b) resistor (c) LED (d) motor
13. 13.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) motor (d) diode
14. 14.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) makes things spin (d) limits the current
15. 15.What does a fuse do? (a) beeps for an alarm (b) blows if current is high (c) stores a little charge (d) senses how hot it is
16. 16.What does a resistor do? (a) stores a little charge (b) turns a fan or wheels (c) has coloured bands (d) boosts a small signal
17. 17.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
18. 18.True or false: an LED glows using little power. (a) False (b) True
19. 19.🧩 Which component senses how hot it is? (a) resistor (b) potentiometer (c) thermistor (d) buzzer
20. 20.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) transistor (d) potentiometer
21. 21.🧩 Which component blows if current is high? (a) fuse (b) motor (c) LED (d) potentiometer
22. 22.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) diode (d) transistor
23. 23.True or false: a transistor smooths a wobbly supply. (a) False (b) True
24. 24.What does an LED do? (a) is a resistance knob (b) glows using little power (c) senses how bright it is (d) turns a fan or wheels
25. 25.🧩 Which component lets current go one way? (a) buzzer (b) thermistor (c) potentiometer (d) diode
26. 26.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) glows using little power (d) blows if current is high
27. 27.🧩 Which component boosts a small signal? (a) thermistor (b) resistor (c) transistor (d) potentiometer
28. 28.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
29. 29.What does a buzzer do? (a) has coloured bands (b) lets current go one way (c) makes a beeping sound (d) stores a little charge
30. 30.🧩 Which component glows using little power? (a) LDR (b) capacitor (c) diode (d) LED
31. 31.True or false: a diode limits the current. (a) False (b) True
32. 32.True or false: a resistor has coloured bands. (a) False (b) True
33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
34. 34.True or false: a buzzer beeps for an alarm. (a) False (b) True
35. 35.🧩 Which component beeps for an alarm? (a) thermistor (b) buzzer (c) diode (d) motor
36. 36.True or false: an LED senses how hot it is. (a) False (b) True
37. 37.What does a capacitor do? (a) boosts a small signal (b) smooths a wobbly supply (c) is a resistance knob (d) senses how hot it is
38. 38.What does a transistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
39. 39.True or false: a motor makes things spin. (a) False (b) True
40. 40.True or false: an LDR lets current go one way. (a) False (b) True

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