Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 179 · 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.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
2. 2.What does a buzzer do? (a) limits the current (b) stores a little charge (c) lets current go one way (d) makes a beeping sound
3. 3.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
5. 5.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) capacitor (d) resistor
6. 6.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
7. 7.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) potentiometer (d) LDR
8. 8.True or false: a capacitor stores a little charge. (a) False (b) True
9. 9.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) resistor (d) LED
10. 10.🧩 Which component glows using little power? (a) resistor (b) LED (c) diode (d) thermistor
11. 11.True or false: a thermistor beeps for an alarm. (a) False (b) True
12. 12.🧩 Which component blows if current is high? (a) diode (b) fuse (c) LED (d) capacitor
13. 13.True or false: a thermistor limits the current. (a) False (b) True
14. 14.What does a transistor do? (a) beeps for an alarm (b) senses how hot it is (c) blows if current is high (d) boosts a small signal
15. 15.🧩 Which component limits the current? (a) motor (b) thermistor (c) resistor (d) transistor
16. 16.True or false: a buzzer senses how bright it is. (a) False (b) True
17. 17.🧩 Which component has coloured bands? (a) capacitor (b) diode (c) resistor (d) motor
18. 18.True or false: a capacitor senses how bright it is. (a) True (b) False
19. 19.True or false: a diode lets current go one way. (a) True (b) False
20. 20.What does a diode do? (a) senses how bright it is (b) turns a fan or wheels (c) limits the current (d) lets current go one way
21. 21.True or false: a thermistor glows using little power. (a) False (b) True
22. 22.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) is a resistance knob (d) senses how hot it is
23. 23.True or false: a fuse turns a fan or wheels. (a) True (b) False
24. 24.What does a fuse do? (a) senses how hot it is (b) stores a little charge (c) smooths a wobbly supply (d) blows if current is high
25. 25.What does a motor do? (a) glows using little power (b) makes things spin (c) beeps for an alarm (d) senses how bright it is
26. 26.What does a buzzer do? (a) is a resistance knob (b) glows using little power (c) beeps for an alarm (d) smooths a wobbly supply
27. 27.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) makes a beeping sound (d) senses how hot it is
28. 28.What does a thermistor do? (a) is a resistance knob (b) senses how bright it is (c) has coloured bands (d) senses how hot it is
29. 29.True or false: a motor has coloured bands. (a) False (b) True
30. 30.What does a resistor do? (a) has coloured bands (b) senses how hot it is (c) is a resistance knob (d) senses how bright it is
31. 31.🧩 Which component is a resistance knob? (a) capacitor (b) fuse (c) potentiometer (d) resistor
32. 32.True or false: a motor makes a beeping sound. (a) False (b) True
33. 33.What does a resistor do? (a) senses how hot it is (b) limits the current (c) makes things spin (d) is a resistance knob
34. 34.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) capacitor (d) diode
35. 35.True or false: a resistor has coloured bands. (a) False (b) True
36. 36.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) diode (d) resistor
37. 37.🧩 Which component boosts a small signal? (a) capacitor (b) diode (c) LDR (d) transistor
38. 38.🧩 Which component stores a little charge? (a) fuse (b) LDR (c) thermistor (d) capacitor
39. 39.True or false: a resistor makes things spin. (a) True (b) False
40. 40.True or false: a motor makes things spin. (a) False (b) True

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