Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 219 · 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) resistor (b) LDR (c) capacitor (d) diode
2. 2.🧩 Which component blows if current is high? (a) resistor (b) capacitor (c) fuse (d) LDR
3. 3.True or false: a transistor makes things spin. (a) False (b) True
4. 4.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
6. 6.What does a transistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) stores a little charge (d) boosts a small signal
7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
8. 8.True or false: a potentiometer is a resistance knob. (a) True (b) False
9. 9.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) capacitor (d) transistor
10. 10.What does a buzzer do? (a) blows if current is high (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
11. 11.True or false: a capacitor lets current go one way. (a) False (b) True
12. 12.True or false: a capacitor has coloured bands. (a) True (b) False
13. 13.What does a diode do? (a) blows if current is high (b) stores a little charge (c) boosts a small signal (d) lets current go one way
14. 14.🧩 Which component lets current go one way? (a) resistor (b) LED (c) diode (d) fuse
15. 15.What does a motor do? (a) has coloured bands (b) limits the current (c) smooths a wobbly supply (d) makes things spin
16. 16.What does an LED do? (a) senses how hot it is (b) makes a beeping sound (c) limits the current (d) glows using little power
17. 17.True or false: a resistor smooths a wobbly supply. (a) True (b) False
18. 18.🧩 Which component makes a beeping sound? (a) LDR (b) fuse (c) buzzer (d) potentiometer
19. 19.🧩 Which component smooths a wobbly supply? (a) resistor (b) fuse (c) capacitor (d) diode
20. 20.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
21. 21.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) is a resistance knob (d) turns a fan or wheels
22. 22.What does a capacitor do? (a) turns a fan or wheels (b) is a resistance knob (c) stores a little charge (d) blows if current is high
23. 23.True or false: a motor has coloured bands. (a) False (b) True
24. 24.What does an LDR do? (a) is a resistance knob (b) limits the current (c) senses how bright it is (d) boosts a small signal
25. 25.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) transistor (d) potentiometer
26. 26.🧩 Which component senses how hot it is? (a) LDR (b) capacitor (c) diode (d) thermistor
27. 27.🧩 Which component turns a fan or wheels? (a) transistor (b) thermistor (c) resistor (d) motor
28. 28.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) lets current go one way (d) turns a fan or wheels
29. 29.True or false: a capacitor blows if current is high. (a) True (b) False
30. 30.True or false: a thermistor senses how hot it is. (a) False (b) True
31. 31.🧩 Which component has coloured bands? (a) LED (b) buzzer (c) fuse (d) resistor
32. 32.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) is a resistance knob (d) makes a beeping sound
33. 33.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) motor (d) transistor
34. 34.True or false: a diode glows using little power. (a) False (b) True
35. 35.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) makes things spin (d) limits the current
36. 36.True or false: a potentiometer has coloured bands. (a) False (b) True
37. 37.True or false: a capacitor senses how bright it is. (a) True (b) False
38. 38.True or false: an LDR beeps for an alarm. (a) True (b) False
39. 39.True or false: a transistor makes a beeping sound. (a) True (b) False
40. 40.What does a resistor do? (a) senses how bright it is (b) glows using little power (c) boosts a small signal (d) limits the current

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