Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 507 · 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 turns a fan or wheels? (a) motor (b) transistor (c) buzzer (d) thermistor
2. 2.🧩 Which component senses how hot it is? (a) potentiometer (b) LDR (c) thermistor (d) fuse
3. 3.True or false: a transistor glows using little power. (a) True (b) False
4. 4.What does a transistor do? (a) has coloured bands (b) senses how hot it is (c) is a resistance knob (d) boosts a small signal
5. 5.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) LDR (d) fuse
6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
7. 7.What does a potentiometer do? (a) is a resistance knob (b) smooths a wobbly supply (c) has coloured bands (d) senses how bright it is
8. 8.What does a diode do? (a) turns a fan or wheels (b) senses how hot it is (c) lets current go one way (d) senses how bright it is
9. 9.True or false: a fuse blows if current is high. (a) True (b) False
10. 10.True or false: a motor makes things spin. (a) False (b) True
11. 11.True or false: a diode turns a fan or wheels. (a) True (b) False
12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
13. 13.True or false: a capacitor senses how hot it is. (a) True (b) False
14. 14.🧩 Which component lets current go one way? (a) motor (b) LDR (c) diode (d) buzzer
15. 15.What does a motor do? (a) glows using little power (b) is a resistance knob (c) makes things spin (d) limits the current
16. 16.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) motor (d) potentiometer
17. 17.What does a buzzer do? (a) senses how bright it is (b) blows if current is high (c) turns a fan or wheels (d) makes a beeping sound
18. 18.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) makes a beeping sound (d) has coloured bands
19. 19.🧩 Which component boosts a small signal? (a) capacitor (b) buzzer (c) motor (d) transistor
20. 20.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) LED (d) motor
21. 21.What does a buzzer do? (a) beeps for an alarm (b) glows using little power (c) has coloured bands (d) senses how hot it is
22. 22.True or false: a motor turns a fan or wheels. (a) False (b) True
23. 23.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
24. 24.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) diode (d) transistor
25. 25.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
26. 26.True or false: an LDR limits the current. (a) False (b) True
27. 27.True or false: a transistor turns a fan or wheels. (a) False (b) True
28. 28.True or false: a capacitor makes things spin. (a) False (b) True
29. 29.True or false: a diode lets current go one way. (a) False (b) True
30. 30.🧩 Which component blows if current is high? (a) thermistor (b) diode (c) fuse (d) LDR
31. 31.What does a resistor do? (a) has coloured bands (b) makes things spin (c) beeps for an alarm (d) turns a fan or wheels
32. 32.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
33. 33.🧩 Which component makes things spin? (a) motor (b) diode (c) buzzer (d) potentiometer
34. 34.True or false: a fuse smooths a wobbly supply. (a) True (b) False
35. 35.True or false: a resistor limits the current. (a) False (b) True
36. 36.What does a thermistor do? (a) limits the current (b) stores a little charge (c) has coloured bands (d) senses how hot it is
37. 37.What does a fuse do? (a) blows if current is high (b) is a resistance knob (c) limits the current (d) senses how bright it is
38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
39. 39.True or false: a buzzer makes things spin. (a) False (b) True
40. 40.What does an LED do? (a) is a resistance knob (b) senses how bright it is (c) blows if current is high (d) glows using little power

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