Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 214 · 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 component smooths a wobbly supply? (a) thermistor (b) buzzer (c) capacitor (d) motor
2. 2.What does a potentiometer do? (a) lets current go one way (b) boosts a small signal (c) is a resistance knob (d) turns a fan or wheels
3. 3.True or false: an LED limits the current. (a) True (b) False
4. 4.🧩 Which component stores a little charge? (a) motor (b) thermistor (c) LDR (d) capacitor
5. 5.True or false: a capacitor makes things spin. (a) False (b) True
6. 6.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
7. 7.True or false: a thermistor beeps for an alarm. (a) True (b) False
8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
9. 9.🧩 Which component senses how bright it is? (a) diode (b) resistor (c) buzzer (d) LDR
10. 10.What does a resistor do? (a) beeps for an alarm (b) blows if current is high (c) has coloured bands (d) is a resistance knob
11. 11.What does an LDR do? (a) beeps for an alarm (b) senses how hot it is (c) makes things spin (d) senses how bright it is
12. 12.🧩 Which component senses how hot it is? (a) transistor (b) potentiometer (c) LDR (d) thermistor
13. 13.🧩 Which component has coloured bands? (a) resistor (b) LED (c) buzzer (d) motor
14. 14.True or false: an LDR smooths a wobbly supply. (a) False (b) True
15. 15.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
16. 16.🧩 Which component limits the current? (a) transistor (b) potentiometer (c) resistor (d) thermistor
17. 17.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) diode (d) transistor
18. 18.True or false: a fuse blows if current is high. (a) False (b) True
19. 19.True or false: a buzzer makes a beeping sound. (a) True (b) False
20. 20.What does a capacitor do? (a) senses how bright it is (b) boosts a small signal (c) lets current go one way (d) smooths a wobbly supply
21. 21.🧩 Which component lets current go one way? (a) capacitor (b) LED (c) diode (d) potentiometer
22. 22.True or false: a transistor limits the current. (a) False (b) True
23. 23.True or false: a diode lets current go one way. (a) False (b) True
24. 24.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) buzzer (d) thermistor
25. 25.True or false: a buzzer senses how hot it is. (a) False (b) True
26. 26.What does a transistor do? (a) makes things spin (b) lets current go one way (c) glows using little power (d) boosts a small signal
27. 27.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
28. 28.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) fuse (d) motor
29. 29.True or false: an LDR beeps for an alarm. (a) False (b) True
30. 30.What does a resistor do? (a) limits the current (b) blows if current is high (c) beeps for an alarm (d) makes things spin
31. 31.What does a diode do? (a) beeps for an alarm (b) is a resistance knob (c) stores a little charge (d) lets current go one way
32. 32.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) has coloured bands (d) blows if current is high
33. 33.True or false: an LDR has coloured bands. (a) False (b) True
34. 34.What does a thermistor do? (a) is a resistance knob (b) blows if current is high (c) senses how hot it is (d) makes a beeping sound
35. 35.True or false: a diode senses how bright it is. (a) True (b) False
36. 36.True or false: a transistor boosts a small signal. (a) False (b) True
37. 37.What does an LED do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) lets current go one way
38. 38.What does a fuse do? (a) makes things spin (b) makes a beeping sound (c) has coloured bands (d) blows if current is high
39. 39.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LDR (d) potentiometer
40. 40.True or false: a potentiometer senses how bright it is. (a) False (b) True

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