Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 713 · 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.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
2. 2.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
3. 3.True or false: a capacitor has coloured bands. (a) True (b) False
4. 4.What does a buzzer do? (a) makes things spin (b) senses how bright it is (c) limits the current (d) beeps for an alarm
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 potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) glows using little power (d) blows if current is high
7. 7.🧩 Which component glows using little power? (a) thermistor (b) LDR (c) capacitor (d) LED
8. 8.True or false: a capacitor glows using little power. (a) True (b) False
9. 9.🧩 Which component smooths a wobbly supply? (a) LED (b) buzzer (c) motor (d) capacitor
10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
11. 11.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) is a resistance knob (d) senses how bright it is
12. 12.True or false: a capacitor turns a fan or wheels. (a) True (b) False
13. 13.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
14. 14.True or false: an LDR limits the current. (a) False (b) True
15. 15.True or false: a fuse makes things spin. (a) True (b) False
16. 16.True or false: a buzzer blows if current is high. (a) True (b) False
17. 17.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) potentiometer (d) thermistor
18. 18.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) glows using little power (d) limits the current
19. 19.🧩 Which component has coloured bands? (a) diode (b) thermistor (c) resistor (d) potentiometer
20. 20.What does a thermistor do? (a) lets current go one way (b) senses how hot it is (c) limits the current (d) has coloured bands
21. 21.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) diode (d) LDR
22. 22.What does a resistor do? (a) makes a beeping sound (b) has coloured bands (c) lets current go one way (d) blows if current is high
23. 23.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) thermistor (d) capacitor
24. 24.True or false: a thermistor senses how hot it is. (a) True (b) False
25. 25.🧩 Which component senses how bright it is? (a) potentiometer (b) transistor (c) LED (d) LDR
26. 26.🧩 Which component limits the current? (a) fuse (b) capacitor (c) LED (d) resistor
27. 27.What does a transistor do? (a) is a resistance knob (b) lets current go one way (c) senses how bright it is (d) boosts a small signal
28. 28.🧩 Which component makes things spin? (a) buzzer (b) resistor (c) motor (d) fuse
29. 29.True or false: a thermistor glows using little power. (a) False (b) True
30. 30.What does an LED do? (a) blows if current is high (b) beeps for an alarm (c) is a resistance knob (d) glows using little power
31. 31.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) makes things spin (d) boosts a small signal
32. 32.What does a capacitor do? (a) makes things spin (b) stores a little charge (c) senses how bright it is (d) limits the current
33. 33.True or false: a resistor blows if current is high. (a) False (b) True
34. 34.True or false: a resistor limits the current. (a) True (b) False
35. 35.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) potentiometer (d) fuse
36. 36.True or false: a transistor stores a little charge. (a) False (b) True
37. 37.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) diode (d) thermistor
38. 38.What does a resistor do? (a) blows if current is high (b) turns a fan or wheels (c) limits the current (d) boosts a small signal
39. 39.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) motor (d) buzzer
40. 40.What does a motor do? (a) senses how bright it is (b) blows if current is high (c) glows using little power (d) turns a fan or wheels

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