Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 231 · 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 limits the current? (a) resistor (b) capacitor (c) buzzer (d) thermistor
2. 2.🧩 Which component senses how hot it is? (a) capacitor (b) LED (c) thermistor (d) motor
3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) buzzer (d) capacitor
4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
6. 6.🧩 Which component smooths a wobbly supply? (a) LED (b) transistor (c) capacitor (d) buzzer
7. 7.What does a buzzer do? (a) makes things spin (b) lets current go one way (c) is a resistance knob (d) beeps for an alarm
8. 8.True or false: a transistor boosts a small signal. (a) False (b) True
9. 9.What does a motor do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) makes things spin
10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
11. 11.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) senses how hot it is (d) blows if current is high
12. 12.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) senses how bright it is (d) lets current go one way
13. 13.True or false: a thermistor blows if current is high. (a) True (b) False
14. 14.What does a buzzer do? (a) senses how hot it is (b) smooths a wobbly supply (c) makes a beeping sound (d) blows if current is high
15. 15.🧩 Which component senses how bright it is? (a) resistor (b) buzzer (c) LDR (d) LED
16. 16.What does a diode do? (a) beeps for an alarm (b) has coloured bands (c) limits the current (d) lets current go one way
17. 17.🧩 Which component blows if current is high? (a) resistor (b) motor (c) fuse (d) thermistor
18. 18.🧩 Which component glows using little power? (a) LDR (b) LED (c) fuse (d) resistor
19. 19.True or false: a potentiometer glows using little power. (a) True (b) False
20. 20.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) potentiometer (d) transistor
21. 21.True or false: a capacitor stores a little charge. (a) True (b) False
22. 22.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) motor (d) LED
23. 23.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) resistor (d) buzzer
24. 24.What does a thermistor do? (a) senses how bright it is (b) smooths a wobbly supply (c) blows if current is high (d) senses how hot it is
25. 25.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) LED (d) thermistor
26. 26.True or false: a resistor has coloured bands. (a) True (b) False
27. 27.True or false: a buzzer glows using little power. (a) True (b) False
28. 28.🧩 Which component has coloured bands? (a) motor (b) buzzer (c) transistor (d) resistor
29. 29.🧩 Which component stores a little charge? (a) motor (b) thermistor (c) transistor (d) capacitor
30. 30.What does a fuse do? (a) is a resistance knob (b) senses how hot it is (c) blows if current is high (d) has coloured bands
31. 31.What does a potentiometer do? (a) is a resistance knob (b) limits the current (c) smooths a wobbly supply (d) boosts a small signal
32. 32.🧩 Which component beeps for an alarm? (a) LED (b) fuse (c) buzzer (d) motor
33. 33.True or false: a potentiometer stores a little charge. (a) False (b) True
34. 34.What does an LDR do? (a) senses how bright it is (b) glows using little power (c) stores a little charge (d) smooths a wobbly supply
35. 35.True or false: a potentiometer makes things spin. (a) True (b) False
36. 36.True or false: a transistor smooths a wobbly supply. (a) True (b) False
37. 37.True or false: a fuse glows using little power. (a) False (b) True
38. 38.True or false: a resistor limits the current. (a) True (b) False
39. 39.True or false: a transistor lets current go one way. (a) False (b) True
40. 40.True or false: a diode boosts a small signal. (a) True (b) False

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