Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 175 · 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 glows using little power? (a) buzzer (b) transistor (c) LED (d) LDR
2. 2.🧩 Which component makes things spin? (a) potentiometer (b) fuse (c) capacitor (d) motor
3. 3.What does a potentiometer do? (a) is a resistance knob (b) smooths a wobbly supply (c) makes things spin (d) boosts a small signal
4. 4.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) resistor (d) diode
5. 5.🧩 Which component stores a little charge? (a) LED (b) LDR (c) capacitor (d) potentiometer
6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
7. 7.What does an LED do? (a) is a resistance knob (b) smooths a wobbly supply (c) glows using little power (d) blows if current is high
8. 8.True or false: a buzzer senses how hot it is. (a) True (b) False
9. 9.True or false: a capacitor stores a little charge. (a) True (b) False
10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
11. 11.🧩 Which component is a resistance knob? (a) resistor (b) fuse (c) potentiometer (d) LED
12. 12.True or false: a buzzer makes a beeping sound. (a) False (b) True
13. 13.What does a diode do? (a) makes things spin (b) glows using little power (c) blows if current is high (d) lets current go one way
14. 14.What does an LDR do? (a) has coloured bands (b) lets current go one way (c) turns a fan or wheels (d) senses how bright it is
15. 15.🧩 Which component has coloured bands? (a) thermistor (b) LDR (c) transistor (d) resistor
16. 16.What does a fuse do? (a) has coloured bands (b) smooths a wobbly supply (c) makes a beeping sound (d) blows if current is high
17. 17.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
18. 18.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) glows using little power (d) turns a fan or wheels
19. 19.What does a motor do? (a) stores a little charge (b) blows if current is high (c) turns a fan or wheels (d) glows using little power
20. 20.🧩 Which component senses how hot it is? (a) motor (b) potentiometer (c) buzzer (d) thermistor
21. 21.True or false: a motor turns a fan or wheels. (a) False (b) True
22. 22.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
23. 23.What does a buzzer do? (a) makes things spin (b) blows if current is high (c) smooths a wobbly supply (d) makes a beeping sound
24. 24.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) capacitor (d) thermistor
25. 25.🧩 Which component limits the current? (a) LDR (b) fuse (c) LED (d) resistor
26. 26.True or false: a motor lets current go one way. (a) True (b) False
27. 27.What does a capacitor do? (a) turns a fan or wheels (b) senses how hot it is (c) smooths a wobbly supply (d) makes a beeping sound
28. 28.True or false: a resistor stores a little charge. (a) False (b) True
29. 29.What does a thermistor do? (a) blows if current is high (b) is a resistance knob (c) turns a fan or wheels (d) senses how hot it is
30. 30.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) LED (d) capacitor
31. 31.True or false: a potentiometer stores a little charge. (a) True (b) False
32. 32.True or false: a resistor limits the current. (a) True (b) False
33. 33.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) makes a beeping sound (d) senses how hot it is
34. 34.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) motor (d) LDR
35. 35.True or false: a thermistor stores a little charge. (a) True (b) False
36. 36.True or false: a capacitor makes things spin. (a) True (b) False
37. 37.What does a motor do? (a) smooths a wobbly supply (b) makes things spin (c) boosts a small signal (d) has coloured bands
38. 38.What does a transistor do? (a) boosts a small signal (b) limits the current (c) stores a little charge (d) makes things spin
39. 39.🧩 Which component beeps for an alarm? (a) fuse (b) LED (c) resistor (d) buzzer
40. 40.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) boosts a small signal (d) smooths a wobbly supply

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