Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 197 · 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 diode (b) a capacitor (c) a buzzer (d) a resistor
2. 2.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) thermistor (d) LED
3. 3.What does a capacitor do? (a) lets current go one way (b) is a resistance knob (c) blows if current is high (d) smooths a wobbly supply
4. 4.🧩 Which component smooths a wobbly supply? (a) resistor (b) transistor (c) potentiometer (d) capacitor
5. 5.🧩 Which component boosts a small signal? (a) LED (b) LDR (c) transistor (d) thermistor
6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
7. 7.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
8. 8.True or false: a fuse senses how bright it is. (a) False (b) True
9. 9.True or false: a motor senses how bright it is. (a) False (b) True
10. 10.What does a resistor do? (a) makes things spin (b) has coloured bands (c) senses how hot it is (d) smooths a wobbly supply
11. 11.True or false: a thermistor makes things spin. (a) False (b) True
12. 12.True or false: a motor makes a beeping sound. (a) True (b) False
13. 13.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) glows using little power (d) limits the current
14. 14.True or false: a capacitor makes a beeping sound. (a) True (b) False
15. 15.🧩 Which component lets current go one way? (a) LED (b) motor (c) diode (d) buzzer
16. 16.True or false: a thermistor turns a fan or wheels. (a) True (b) False
17. 17.What does a capacitor do? (a) has coloured bands (b) senses how bright it is (c) stores a little charge (d) turns a fan or wheels
18. 18.What does a buzzer do? (a) is a resistance knob (b) has coloured bands (c) makes a beeping sound (d) boosts a small signal
19. 19.🧩 Which component makes a beeping sound? (a) transistor (b) fuse (c) capacitor (d) buzzer
20. 20.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) capacitor (d) motor
21. 21.🧩 Which component has coloured bands? (a) capacitor (b) thermistor (c) resistor (d) fuse
22. 22.What does an LED do? (a) glows using little power (b) senses how bright it is (c) limits the current (d) senses how hot it is
23. 23.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) resistor (d) buzzer
24. 24.What does a potentiometer do? (a) has coloured bands (b) beeps for an alarm (c) turns a fan or wheels (d) is a resistance knob
25. 25.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) stores a little charge (d) beeps for an alarm
26. 26.True or false: a diode lets current go one way. (a) True (b) False
27. 27.What does a fuse do? (a) boosts a small signal (b) senses how bright it is (c) senses how hot it is (d) blows if current is high
28. 28.🧩 Which component turns a fan or wheels? (a) thermistor (b) resistor (c) diode (d) motor
29. 29.What does a buzzer do? (a) beeps for an alarm (b) makes things spin (c) limits the current (d) stores a little charge
30. 30.True or false: a diode glows using little power. (a) True (b) False
31. 31.True or false: an LED makes a beeping sound. (a) True (b) False
32. 32.🧩 Which component makes things spin? (a) motor (b) transistor (c) diode (d) potentiometer
33. 33.True or false: a motor stores a little charge. (a) False (b) True
34. 34.What does a diode do? (a) limits the current (b) is a resistance knob (c) lets current go one way (d) beeps for an alarm
35. 35.True or false: an LDR senses how bright it is. (a) True (b) False
36. 36.What does a motor do? (a) boosts a small signal (b) turns a fan or wheels (c) is a resistance knob (d) senses how bright it is
37. 37.True or false: a resistor glows using little power. (a) True (b) False
38. 38.True or false: a thermistor senses how hot it is. (a) False (b) True
39. 39.What does a motor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) boosts a small signal (d) makes things spin
40. 40.🧩 Which component limits the current? (a) LED (b) resistor (c) buzzer (d) thermistor

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