Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 297 · 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.True or false: a fuse blows if current is high. (a) False (b) True
2. 2.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) blows if current is high (d) senses how bright it is
3. 3.🧩 Which component makes a beeping sound? (a) motor (b) LED (c) fuse (d) buzzer
4. 4.What does an LED do? (a) smooths a wobbly supply (b) blows if current is high (c) senses how hot it is (d) glows using little power
5. 5.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) motor (d) transistor
6. 6.🧩 Which component stores a little charge? (a) thermistor (b) resistor (c) potentiometer (d) capacitor
7. 7.What does a motor do? (a) senses how hot it is (b) is a resistance knob (c) has coloured bands (d) turns a fan or wheels
8. 8.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
9. 9.What does a thermistor do? (a) makes things spin (b) turns a fan or wheels (c) senses how hot it is (d) limits the current
10. 10.🧩 Which component lets current go one way? (a) transistor (b) resistor (c) diode (d) fuse
11. 11.True or false: an LED glows using little power. (a) False (b) True
12. 12.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) buzzer (d) resistor
13. 13.What does a buzzer do? (a) lets current go one way (b) makes a beeping sound (c) has coloured bands (d) turns a fan or wheels
14. 14.What does a resistor do? (a) stores a little charge (b) is a resistance knob (c) limits the current (d) makes a beeping sound
15. 15.🧩 Which component turns a fan or wheels? (a) resistor (b) transistor (c) buzzer (d) motor
16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
17. 17.True or false: a resistor has coloured bands. (a) True (b) False
18. 18.True or false: a transistor boosts a small signal. (a) False (b) True
19. 19.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) boosts a small signal (d) limits the current
20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
21. 21.What does a capacitor do? (a) is a resistance knob (b) glows using little power (c) smooths a wobbly supply (d) makes a beeping sound
22. 22.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
23. 23.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) transistor (d) fuse
24. 24.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) capacitor (d) resistor
25. 25.What does an LDR do? (a) has coloured bands (b) limits the current (c) boosts a small signal (d) senses how bright it is
26. 26.What does a buzzer do? (a) limits the current (b) senses how hot it is (c) senses how bright it is (d) beeps for an alarm
27. 27.🧩 Which component smooths a wobbly supply? (a) buzzer (b) transistor (c) capacitor (d) motor
28. 28.True or false: a resistor senses how bright it is. (a) True (b) False
29. 29.What does a resistor do? (a) senses how bright it is (b) senses how hot it is (c) lets current go one way (d) has coloured bands
30. 30.🧩 Which component limits the current? (a) thermistor (b) fuse (c) LED (d) resistor
31. 31.What does a diode do? (a) makes things spin (b) is a resistance knob (c) limits the current (d) lets current go one way
32. 32.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) resistor (d) capacitor
33. 33.🧩 Which component beeps for an alarm? (a) motor (b) potentiometer (c) buzzer (d) LDR
34. 34.True or false: a diode boosts a small signal. (a) False (b) True
35. 35.True or false: a motor makes a beeping sound. (a) True (b) False
36. 36.True or false: a motor makes things spin. (a) True (b) False
37. 37.What does a potentiometer do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) boosts a small signal
38. 38.True or false: an LDR senses how hot it is. (a) True (b) False
39. 39.True or false: a resistor smooths a wobbly supply. (a) False (b) True
40. 40.True or false: a resistor limits the current. (a) True (b) False

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