Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 145 · 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.What does a buzzer do? (a) smooths a wobbly supply (b) blows if current is high (c) limits the current (d) makes a beeping sound
2. 2.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) buzzer (d) resistor
3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
4. 4.True or false: a fuse limits the current. (a) True (b) False
5. 5.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) LDR (d) motor
6. 6.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) has coloured bands (d) smooths a wobbly supply
7. 7.What does a motor do? (a) stores a little charge (b) makes things spin (c) has coloured bands (d) lets current go one way
8. 8.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) fuse (d) LDR
9. 9.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) buzzer (d) resistor
10. 10.🧩 Which component limits the current? (a) resistor (b) motor (c) fuse (d) LDR
11. 11.True or false: a motor turns a fan or wheels. (a) False (b) True
12. 12.🧩 Which component makes a beeping sound? (a) capacitor (b) fuse (c) buzzer (d) motor
13. 13.True or false: an LED glows using little power. (a) True (b) False
14. 14.True or false: a capacitor senses how hot it is. (a) True (b) False
15. 15.🧩 Which component turns a fan or wheels? (a) capacitor (b) transistor (c) motor (d) resistor
16. 16.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
17. 17.True or false: a buzzer makes a beeping sound. (a) False (b) True
18. 18.🧩 Which component glows using little power? (a) LED (b) transistor (c) diode (d) fuse
19. 19.What does a capacitor do? (a) limits the current (b) turns a fan or wheels (c) boosts a small signal (d) smooths a wobbly supply
20. 20.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
21. 21.True or false: a motor makes a beeping sound. (a) False (b) True
22. 22.What does a diode do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) lets current go one way
23. 23.🧩 Which component stores a little charge? (a) motor (b) potentiometer (c) capacitor (d) diode
24. 24.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) boosts a small signal (d) makes a beeping sound
25. 25.🧩 Which component has coloured bands? (a) fuse (b) buzzer (c) resistor (d) motor
26. 26.🧩 Which component makes things spin? (a) motor (b) thermistor (c) LED (d) diode
27. 27.True or false: an LED smooths a wobbly supply. (a) True (b) False
28. 28.🧩 Which component beeps for an alarm? (a) capacitor (b) motor (c) LED (d) buzzer
29. 29.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
30. 30.True or false: a potentiometer is a resistance knob. (a) True (b) False
31. 31.What does a buzzer do? (a) makes things spin (b) beeps for an alarm (c) senses how bright it is (d) limits the current
32. 32.True or false: a diode limits the current. (a) False (b) True
33. 33.True or false: a resistor boosts a small signal. (a) True (b) False
34. 34.True or false: a capacitor stores a little charge. (a) False (b) True
35. 35.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) is a resistance knob (d) stores a little charge
36. 36.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) senses how bright it is (d) glows using little power
37. 37.True or false: a transistor limits the current. (a) False (b) True
38. 38.What does an LED do? (a) boosts a small signal (b) stores a little charge (c) glows using little power (d) smooths a wobbly supply
39. 39.🧩 Which component is a resistance knob? (a) fuse (b) LDR (c) potentiometer (d) buzzer
40. 40.True or false: a capacitor makes things spin. (a) False (b) True

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