Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 592 · 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 component beeps for an alarm? (a) resistor (b) buzzer (c) diode (d) potentiometer
2. 2.True or false: a thermistor senses how hot it is. (a) True (b) False
3. 3.True or false: a capacitor stores a little charge. (a) False (b) True
4. 4.🧩 Which component lets current go one way? (a) fuse (b) LED (c) resistor (d) diode
5. 5.🧩 Which component is a resistance knob? (a) motor (b) transistor (c) potentiometer (d) resistor
6. 6.🧩 Which component senses how bright it is? (a) LED (b) buzzer (c) fuse (d) LDR
7. 7.🧩 Which component has coloured bands? (a) buzzer (b) capacitor (c) resistor (d) LDR
8. 8.True or false: a diode boosts a small signal. (a) False (b) True
9. 9.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
10. 10.What does a capacitor do? (a) senses how bright it is (b) smooths a wobbly supply (c) glows using little power (d) turns a fan or wheels
11. 11.True or false: a buzzer makes things spin. (a) True (b) False
12. 12.🧩 Which component turns a fan or wheels? (a) transistor (b) fuse (c) motor (d) thermistor
13. 13.What does an LDR do? (a) glows using little power (b) senses how bright it is (c) blows if current is high (d) makes things spin
14. 14.🧩 Which component senses how hot it is? (a) buzzer (b) fuse (c) thermistor (d) LED
15. 15.What does a buzzer do? (a) stores a little charge (b) smooths a wobbly supply (c) makes a beeping sound (d) is a resistance knob
16. 16.🧩 Which component limits the current? (a) potentiometer (b) transistor (c) thermistor (d) resistor
17. 17.What does a buzzer do? (a) turns a fan or wheels (b) boosts a small signal (c) beeps for an alarm (d) senses how hot it is
18. 18.What does a capacitor do? (a) lets current go one way (b) makes a beeping sound (c) stores a little charge (d) senses how hot it is
19. 19.🧩 Which component makes a beeping sound? (a) transistor (b) thermistor (c) buzzer (d) potentiometer
20. 20.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
21. 21.🧩 Which component makes things spin? (a) transistor (b) resistor (c) thermistor (d) motor
22. 22.True or false: a buzzer makes a beeping sound. (a) False (b) True
23. 23.What does a potentiometer do? (a) blows if current is high (b) limits the current (c) is a resistance knob (d) senses how bright it is
24. 24.🧩 Which component glows using little power? (a) transistor (b) LED (c) buzzer (d) potentiometer
25. 25.What does a thermistor do? (a) smooths a wobbly supply (b) glows using little power (c) senses how hot it is (d) beeps for an alarm
26. 26.True or false: a potentiometer has coloured bands. (a) True (b) False
27. 27.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
28. 28.What does an LED do? (a) smooths a wobbly supply (b) senses how hot it is (c) glows using little power (d) has coloured bands
29. 29.True or false: a diode lets current go one way. (a) True (b) False
30. 30.True or false: a buzzer stores a little charge. (a) True (b) False
31. 31.What does a fuse do? (a) blows if current is high (b) makes things spin (c) makes a beeping sound (d) lets current go one way
32. 32.🧩 Which component boosts a small signal? (a) resistor (b) LED (c) transistor (d) buzzer
33. 33.True or false: an LDR smooths a wobbly supply. (a) False (b) True
34. 34.True or false: a buzzer beeps for an alarm. (a) True (b) False
35. 35.True or false: a thermistor stores a little charge. (a) False (b) True
36. 36.What does a transistor do? (a) beeps for an alarm (b) limits the current (c) stores a little charge (d) boosts a small signal
37. 37.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
38. 38.True or false: a motor makes things spin. (a) True (b) False
39. 39.What does a diode do? (a) glows using little power (b) limits the current (c) is a resistance knob (d) lets current go one way
40. 40.True or false: a resistor boosts a small signal. (a) True (b) False

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