Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 418 · 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 buzzer do? (a) limits the current (b) makes things spin (c) beeps for an alarm (d) has coloured bands
2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
3. 3.🧩 Which component senses how hot it is? (a) motor (b) capacitor (c) potentiometer (d) thermistor
4. 4.🧩 Which component senses how bright it is? (a) motor (b) resistor (c) LDR (d) buzzer
5. 5.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
6. 6.🧩 Which component boosts a small signal? (a) fuse (b) diode (c) capacitor (d) transistor
7. 7.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) resistor (d) capacitor
8. 8.What does a diode do? (a) limits the current (b) has coloured bands (c) lets current go one way (d) smooths a wobbly supply
9. 9.🧩 Which component blows if current is high? (a) fuse (b) motor (c) transistor (d) resistor
10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
11. 11.🧩 Which component has coloured bands? (a) resistor (b) motor (c) LED (d) capacitor
12. 12.True or false: a capacitor turns a fan or wheels. (a) False (b) True
13. 13.What does an LED do? (a) senses how hot it is (b) glows using little power (c) lets current go one way (d) limits the current
14. 14.True or false: a thermistor limits the current. (a) True (b) False
15. 15.True or false: a resistor stores a little charge. (a) True (b) False
16. 16.🧩 Which component glows using little power? (a) transistor (b) LED (c) potentiometer (d) capacitor
17. 17.What does a potentiometer do? (a) makes a beeping sound (b) senses how hot it is (c) is a resistance knob (d) limits the current
18. 18.True or false: an LDR glows using little power. (a) True (b) False
19. 19.True or false: an LED stores a little charge. (a) False (b) True
20. 20.What does a resistor do? (a) senses how bright it is (b) stores a little charge (c) has coloured bands (d) senses how hot it is
21. 21.True or false: a resistor lets current go one way. (a) True (b) False
22. 22.🧩 Which component turns a fan or wheels? (a) resistor (b) LED (c) motor (d) LDR
23. 23.What does a capacitor do? (a) senses how hot it is (b) is a resistance knob (c) beeps for an alarm (d) smooths a wobbly supply
24. 24.True or false: a buzzer beeps for an alarm. (a) False (b) True
25. 25.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) LED (d) fuse
26. 26.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
27. 27.What does a capacitor do? (a) has coloured bands (b) beeps for an alarm (c) boosts a small signal (d) stores a little charge
28. 28.🧩 Which component is a resistance knob? (a) transistor (b) motor (c) potentiometer (d) LED
29. 29.True or false: a thermistor senses how hot it is. (a) True (b) False
30. 30.True or false: a motor turns a fan or wheels. (a) False (b) True
31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
32. 32.🧩 Which component limits the current? (a) buzzer (b) thermistor (c) resistor (d) capacitor
33. 33.What does a transistor do? (a) makes things spin (b) boosts a small signal (c) stores a little charge (d) glows using little power
34. 34.True or false: a fuse blows if current is high. (a) False (b) True
35. 35.True or false: a motor limits the current. (a) True (b) False
36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
37. 37.What does a motor do? (a) lets current go one way (b) makes a beeping sound (c) turns a fan or wheels (d) beeps for an alarm
38. 38.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LED (d) thermistor
39. 39.True or false: a resistor has coloured bands. (a) True (b) False
40. 40.What does a buzzer do? (a) glows using little power (b) senses how bright it is (c) turns a fan or wheels (d) makes a beeping sound

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