Electronics Worksheet: Electronic Components

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

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