Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 258 · 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.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
2. 2.True or false: a transistor senses how hot it is. (a) False (b) True
3. 3.True or false: a buzzer beeps for an alarm. (a) True (b) False
4. 4.🧩 Which component lets current go one way? (a) LDR (b) transistor (c) thermistor (d) diode
5. 5.🧩 Which component smooths a wobbly supply? (a) LDR (b) potentiometer (c) capacitor (d) fuse
6. 6.🧩 Which component stores a little charge? (a) transistor (b) motor (c) fuse (d) capacitor
7. 7.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) limits the current (d) smooths a wobbly supply
8. 8.🧩 Which component blows if current is high? (a) LDR (b) LED (c) fuse (d) capacitor
9. 9.True or false: a potentiometer limits the current. (a) True (b) False
10. 10.What does a resistor do? (a) glows using little power (b) beeps for an alarm (c) has coloured bands (d) makes things spin
11. 11.🧩 Which component boosts a small signal? (a) resistor (b) LDR (c) transistor (d) capacitor
12. 12.🧩 Which component makes things spin? (a) motor (b) fuse (c) LDR (d) buzzer
13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
14. 14.🧩 Which component senses how bright it is? (a) thermistor (b) resistor (c) LDR (d) buzzer
15. 15.What does a diode do? (a) senses how hot it is (b) lets current go one way (c) stores a little charge (d) blows if current is high
16. 16.🧩 Which component turns a fan or wheels? (a) capacitor (b) thermistor (c) buzzer (d) motor
17. 17.True or false: a transistor has coloured bands. (a) True (b) False
18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
19. 19.True or false: a diode glows using little power. (a) True (b) False
20. 20.🧩 Which component glows using little power? (a) thermistor (b) motor (c) resistor (d) LED
21. 21.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) smooths a wobbly supply (d) is a resistance knob
22. 22.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
23. 23.True or false: an LED has coloured bands. (a) False (b) True
24. 24.What does a buzzer do? (a) makes things spin (b) blows if current is high (c) beeps for an alarm (d) senses how hot it is
25. 25.What does a thermistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) glows using little power
26. 26.🧩 Which component limits the current? (a) buzzer (b) resistor (c) diode (d) fuse
27. 27.What does a motor do? (a) senses how bright it is (b) limits the current (c) makes things spin (d) blows if current is high
28. 28.What does an LDR do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how bright it is (d) makes a beeping sound
29. 29.What does an LED do? (a) makes things spin (b) glows using little power (c) is a resistance knob (d) turns a fan or wheels
30. 30.🧩 Which component has coloured bands? (a) buzzer (b) transistor (c) diode (d) resistor
31. 31.True or false: a buzzer lets current go one way. (a) True (b) False
32. 32.True or false: a capacitor stores a little charge. (a) True (b) False
33. 33.What does a resistor do? (a) stores a little charge (b) turns a fan or wheels (c) makes a beeping sound (d) limits the current
34. 34.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) senses how bright it is (d) is a resistance knob
35. 35.True or false: a potentiometer is a resistance knob. (a) True (b) False
36. 36.True or false: an LED smooths a wobbly supply. (a) True (b) False
37. 37.True or false: a potentiometer glows using little power. (a) False (b) True
38. 38.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) stores a little charge (d) is a resistance knob
39. 39.True or false: an LDR beeps for an alarm. (a) False (b) True
40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) motor (d) resistor

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