Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 402 · 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 beeps for an alarm? (a) motor (b) fuse (c) capacitor (d) buzzer
2. 2.🧩 Which component blows if current is high? (a) LED (b) thermistor (c) capacitor (d) fuse
3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
4. 4.What does a buzzer do? (a) makes a beeping sound (b) limits the current (c) stores a little charge (d) blows if current is high
5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
6. 6.What does a capacitor do? (a) stores a little charge (b) limits the current (c) has coloured bands (d) makes things spin
7. 7.True or false: a transistor turns a fan or wheels. (a) False (b) True
8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
9. 9.🧩 Which component stores a little charge? (a) fuse (b) transistor (c) thermistor (d) capacitor
10. 10.What does an LED do? (a) senses how bright it is (b) has coloured bands (c) stores a little charge (d) glows using little power
11. 11.🧩 Which component limits the current? (a) capacitor (b) resistor (c) buzzer (d) motor
12. 12.True or false: a motor blows if current is high. (a) True (b) False
13. 13.True or false: a potentiometer limits the current. (a) True (b) False
14. 14.🧩 Which component has coloured bands? (a) LDR (b) thermistor (c) resistor (d) buzzer
15. 15.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
16. 16.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) potentiometer (d) transistor
17. 17.🧩 Which component makes things spin? (a) transistor (b) motor (c) LED (d) capacitor
18. 18.What does a resistor do? (a) senses how hot it is (b) limits the current (c) stores a little charge (d) blows if current is high
19. 19.True or false: a transistor boosts a small signal. (a) True (b) False
20. 20.🧩 Which component boosts a small signal? (a) fuse (b) buzzer (c) transistor (d) potentiometer
21. 21.True or false: a potentiometer lets current go one way. (a) True (b) False
22. 22.🧩 Which component lets current go one way? (a) diode (b) fuse (c) resistor (d) transistor
23. 23.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) limits the current (d) senses how hot it is
24. 24.What does a fuse do? (a) stores a little charge (b) lets current go one way (c) turns a fan or wheels (d) blows if current is high
25. 25.🧩 Which component glows using little power? (a) LED (b) thermistor (c) buzzer (d) capacitor
26. 26.True or false: a diode lets current go one way. (a) True (b) False
27. 27.What does an LDR do? (a) lets current go one way (b) senses how hot it is (c) senses how bright it is (d) smooths a wobbly supply
28. 28.🧩 Which component senses how bright it is? (a) thermistor (b) buzzer (c) LDR (d) diode
29. 29.True or false: a buzzer senses how bright it is. (a) False (b) True
30. 30.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) fuse (d) potentiometer
31. 31.What does a buzzer do? (a) senses how hot it is (b) makes things spin (c) beeps for an alarm (d) stores a little charge
32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
33. 33.🧩 Which component is a resistance knob? (a) LDR (b) transistor (c) potentiometer (d) motor
34. 34.True or false: a thermistor has coloured bands. (a) False (b) True
35. 35.True or false: a thermistor limits the current. (a) False (b) True
36. 36.True or false: a resistor limits the current. (a) True (b) False
37. 37.What does a potentiometer do? (a) makes a beeping sound (b) makes things spin (c) is a resistance knob (d) has coloured bands
38. 38.What does a motor do? (a) limits the current (b) makes things spin (c) makes a beeping sound (d) smooths a wobbly supply
39. 39.What does a thermistor do? (a) lets current go one way (b) smooths a wobbly supply (c) glows using little power (d) senses how hot it is
40. 40.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) resistor (d) buzzer

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