Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 639 · 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 fuse do? (a) senses how bright it is (b) lets current go one way (c) blows if current is high (d) makes things spin
2. 2.🧩 Which component beeps for an alarm? (a) thermistor (b) buzzer (c) LDR (d) transistor
3. 3.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
4. 4.True or false: a capacitor is a resistance knob. (a) False (b) True
5. 5.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) buzzer (d) potentiometer
6. 6.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
7. 7.True or false: a potentiometer limits the current. (a) True (b) False
8. 8.What does a buzzer do? (a) glows using little power (b) boosts a small signal (c) has coloured bands (d) makes a beeping sound
9. 9.What does a resistor do? (a) senses how bright it is (b) smooths a wobbly supply (c) makes a beeping sound (d) limits the current
10. 10.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) potentiometer (d) fuse
11. 11.What does a motor do? (a) beeps for an alarm (b) senses how bright it is (c) senses how hot it is (d) turns a fan or wheels
12. 12.🧩 Which component makes things spin? (a) motor (b) diode (c) LDR (d) transistor
13. 13.True or false: a motor turns a fan or wheels. (a) True (b) False
14. 14.True or false: an LED glows using little power. (a) True (b) False
15. 15.🧩 Which component turns a fan or wheels? (a) transistor (b) fuse (c) potentiometer (d) motor
16. 16.🧩 Which component blows if current is high? (a) thermistor (b) LED (c) potentiometer (d) fuse
17. 17.What does an LED do? (a) turns a fan or wheels (b) senses how hot it is (c) glows using little power (d) senses how bright it is
18. 18.True or false: a thermistor senses how hot it is. (a) True (b) False
19. 19.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
20. 20.🧩 Which component smooths a wobbly supply? (a) diode (b) potentiometer (c) transistor (d) capacitor
21. 21.What does a transistor do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) boosts a small signal
22. 22.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) potentiometer (d) buzzer
23. 23.What does a resistor do? (a) boosts a small signal (b) makes a beeping sound (c) stores a little charge (d) has coloured bands
24. 24.True or false: a diode lets current go one way. (a) True (b) False
25. 25.True or false: a fuse senses how bright it is. (a) True (b) False
26. 26.True or false: a thermistor has coloured bands. (a) True (b) False
27. 27.What does a potentiometer do? (a) turns a fan or wheels (b) senses how bright it is (c) limits the current (d) is a resistance knob
28. 28.True or false: a buzzer beeps for an alarm. (a) True (b) False
29. 29.What does a buzzer do? (a) blows if current is high (b) turns a fan or wheels (c) beeps for an alarm (d) is a resistance knob
30. 30.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) glows using little power
31. 31.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) turns a fan or wheels (d) makes a beeping sound
32. 32.True or false: a fuse smooths a wobbly supply. (a) False (b) True
33. 33.True or false: a resistor beeps for an alarm. (a) True (b) False
34. 34.True or false: an LDR senses how bright it is. (a) True (b) False
35. 35.What does a capacitor do? (a) stores a little charge (b) senses how bright it is (c) turns a fan or wheels (d) blows if current is high
36. 36.True or false: a buzzer makes a beeping sound. (a) True (b) False
37. 37.True or false: a resistor has coloured bands. (a) True (b) False
38. 38.🧩 Which component makes a beeping sound? (a) LED (b) capacitor (c) potentiometer (d) buzzer
39. 39.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
40. 40.True or false: a diode beeps for an alarm. (a) False (b) True

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