Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 194 · 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 limits the current? (a) LED (b) diode (c) LDR (d) resistor
2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
5. 5.What does a buzzer do? (a) senses how hot it is (b) is a resistance knob (c) boosts a small signal (d) makes a beeping sound
6. 6.🧩 Which component stores a little charge? (a) resistor (b) transistor (c) fuse (d) capacitor
7. 7.🧩 Which component senses how bright it is? (a) resistor (b) motor (c) fuse (d) LDR
8. 8.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) transistor (d) buzzer
9. 9.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
10. 10.🧩 Which component blows if current is high? (a) capacitor (b) motor (c) LDR (d) fuse
11. 11.True or false: an LED beeps for an alarm. (a) False (b) True
12. 12.True or false: a buzzer makes a beeping sound. (a) True (b) False
13. 13.What does an LED do? (a) glows using little power (b) has coloured bands (c) smooths a wobbly supply (d) is a resistance knob
14. 14.True or false: a buzzer is a resistance knob. (a) True (b) False
15. 15.True or false: a resistor smooths a wobbly supply. (a) True (b) False
16. 16.🧩 Which component beeps for an alarm? (a) resistor (b) diode (c) LED (d) buzzer
17. 17.True or false: an LED smooths a wobbly supply. (a) False (b) True
18. 18.What does a buzzer do? (a) has coloured bands (b) lets current go one way (c) is a resistance knob (d) beeps for an alarm
19. 19.True or false: an LDR lets current go one way. (a) True (b) False
20. 20.What does an LDR do? (a) boosts a small signal (b) glows using little power (c) is a resistance knob (d) senses how bright it is
21. 21.What does a resistor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal
22. 22.What does a motor do? (a) has coloured bands (b) blows if current is high (c) is a resistance knob (d) turns a fan or wheels
23. 23.🧩 Which component boosts a small signal? (a) motor (b) buzzer (c) transistor (d) resistor
24. 24.🧩 Which component has coloured bands? (a) thermistor (b) LDR (c) capacitor (d) resistor
25. 25.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) senses how bright it is (d) smooths a wobbly supply
26. 26.True or false: an LDR makes things spin. (a) True (b) False
27. 27.True or false: a resistor limits the current. (a) False (b) True
28. 28.True or false: a thermistor senses how bright it is. (a) True (b) False
29. 29.🧩 Which component makes things spin? (a) fuse (b) diode (c) transistor (d) motor
30. 30.What does a motor do? (a) makes things spin (b) has coloured bands (c) glows using little power (d) blows if current is high
31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
32. 32.True or false: a resistor senses how bright it is. (a) True (b) False
33. 33.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) limits the current (d) senses how bright it is
34. 34.True or false: a motor turns a fan or wheels. (a) True (b) False
35. 35.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) potentiometer (d) buzzer
36. 36.What does a capacitor do? (a) boosts a small signal (b) is a resistance knob (c) makes a beeping sound (d) smooths a wobbly supply
37. 37.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) makes things spin (d) limits the current
38. 38.True or false: a capacitor limits the current. (a) True (b) False
39. 39.True or false: a buzzer beeps for an alarm. (a) True (b) False
40. 40.🧩 Which component smooths a wobbly supply? (a) fuse (b) LED (c) potentiometer (d) capacitor

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