Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 444 · 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 an LDR do? (a) limits the current (b) makes a beeping sound (c) is a resistance knob (d) senses how bright it is
2. 2.True or false: a resistor turns a fan or wheels. (a) False (b) True
3. 3.🧩 Which component boosts a small signal? (a) fuse (b) potentiometer (c) transistor (d) LDR
4. 4.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) diode (d) LED
5. 5.True or false: a fuse makes a beeping sound. (a) False (b) True
6. 6.What does a fuse do? (a) blows if current is high (b) boosts a small signal (c) smooths a wobbly supply (d) limits the current
7. 7.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
8. 8.What does a diode do? (a) stores a little charge (b) beeps for an alarm (c) lets current go one way (d) is a resistance knob
9. 9.True or false: an LED limits the current. (a) False (b) True
10. 10.🧩 Which component is a resistance knob? (a) buzzer (b) thermistor (c) fuse (d) potentiometer
11. 11.What does a capacitor do? (a) smooths a wobbly supply (b) blows if current is high (c) senses how hot it is (d) lets current go one way
12. 12.What does a motor do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes a beeping sound (d) makes things spin
13. 13.True or false: a motor makes a beeping sound. (a) True (b) False
14. 14.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
15. 15.🧩 Which component glows using little power? (a) LED (b) transistor (c) resistor (d) capacitor
16. 16.🧩 Which component limits the current? (a) capacitor (b) LED (c) buzzer (d) resistor
17. 17.True or false: a motor smooths a wobbly supply. (a) False (b) True
18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
19. 19.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) buzzer (d) motor
20. 20.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
21. 21.True or false: an LDR senses how bright it is. (a) True (b) False
22. 22.True or false: a resistor blows if current is high. (a) True (b) False
23. 23.True or false: a potentiometer is a resistance knob. (a) False (b) True
24. 24.What does a resistor do? (a) lets current go one way (b) boosts a small signal (c) makes a beeping sound (d) limits the current
25. 25.What does a potentiometer do? (a) blows if current is high (b) lets current go one way (c) is a resistance knob (d) turns a fan or wheels
26. 26.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) buzzer (d) capacitor
27. 27.🧩 Which component stores a little charge? (a) LED (b) thermistor (c) capacitor (d) potentiometer
28. 28.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) diode (d) capacitor
29. 29.True or false: a thermistor senses how hot it is. (a) True (b) False
30. 30.What does a buzzer do? (a) has coloured bands (b) turns a fan or wheels (c) glows using little power (d) makes a beeping sound
31. 31.🧩 Which component turns a fan or wheels? (a) resistor (b) transistor (c) diode (d) motor
32. 32.True or false: a fuse blows if current is high. (a) True (b) False
33. 33.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) has coloured bands (d) senses how bright it is
34. 34.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
35. 35.🧩 Which component senses how bright it is? (a) motor (b) buzzer (c) LDR (d) potentiometer
36. 36.What does a capacitor do? (a) lets current go one way (b) makes a beeping sound (c) has coloured bands (d) stores a little charge
37. 37.True or false: an LDR beeps for an alarm. (a) True (b) False
38. 38.What does an LED do? (a) makes things spin (b) blows if current is high (c) glows using little power (d) lets current go one way
39. 39.True or false: a fuse limits the current. (a) False (b) True
40. 40.🧩 Which component lets current go one way? (a) motor (b) transistor (c) LDR (d) diode

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