Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 163 · 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 part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
2. 2.What does a resistor do? (a) senses how bright it is (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
3. 3.What does an LDR do? (a) blows if current is high (b) smooths a wobbly supply (c) boosts a small signal (d) senses how bright it is
4. 4.True or false: a potentiometer makes a beeping sound. (a) True (b) False
5. 5.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) LDR (d) diode
6. 6.True or false: a resistor lets current go one way. (a) True (b) False
7. 7.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) turns a fan or wheels (d) lets current go one way
8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
9. 9.True or false: a potentiometer stores a little charge. (a) False (b) True
10. 10.True or false: an LED blows if current is high. (a) True (b) False
11. 11.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) capacitor (d) diode
12. 12.True or false: an LED turns a fan or wheels. (a) False (b) True
13. 13.True or false: an LED is a resistance knob. (a) False (b) True
14. 14.🧩 Which component limits the current? (a) thermistor (b) capacitor (c) potentiometer (d) resistor
15. 15.🧩 Which component has coloured bands? (a) transistor (b) diode (c) LED (d) resistor
16. 16.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) transistor (d) thermistor
17. 17.What does a motor do? (a) smooths a wobbly supply (b) limits the current (c) turns a fan or wheels (d) lets current go one way
18. 18.🧩 Which component glows using little power? (a) fuse (b) LED (c) resistor (d) buzzer
19. 19.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) diode (d) potentiometer
20. 20.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) motor (d) potentiometer
21. 21.True or false: a capacitor senses how hot it is. (a) False (b) True
22. 22.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) diode (d) potentiometer
23. 23.True or false: a thermistor senses how hot it is. (a) True (b) False
24. 24.True or false: a diode lets current go one way. (a) False (b) True
25. 25.🧩 Which component smooths a wobbly supply? (a) motor (b) buzzer (c) transistor (d) capacitor
26. 26.What does a transistor do? (a) is a resistance knob (b) boosts a small signal (c) glows using little power (d) beeps for an alarm
27. 27.True or false: a capacitor makes a beeping sound. (a) False (b) True
28. 28.True or false: a thermistor makes a beeping sound. (a) True (b) False
29. 29.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
31. 31.True or false: a potentiometer glows using little power. (a) True (b) False
32. 32.What does a capacitor do? (a) smooths a wobbly supply (b) is a resistance knob (c) blows if current is high (d) boosts a small signal
33. 33.What does a potentiometer do? (a) stores a little charge (b) has coloured bands (c) senses how hot it is (d) is a resistance knob
34. 34.True or false: a transistor senses how hot it is. (a) False (b) True
35. 35.🧩 Which component lets current go one way? (a) buzzer (b) motor (c) transistor (d) diode
36. 36.True or false: a buzzer beeps for an alarm. (a) False (b) True
37. 37.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) smooths a wobbly supply (d) has coloured bands
38. 38.True or false: an LDR senses how bright it is. (a) True (b) False
39. 39.What does a thermistor do? (a) blows if current is high (b) senses how bright it is (c) senses how hot it is (d) glows using little power
40. 40.True or false: a fuse stores a little charge. (a) False (b) True

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