Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 355 · 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 turns a fan or wheels? (a) diode (b) motor (c) transistor (d) thermistor
2. 2.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
3. 3.What does a diode do? (a) lets current go one way (b) smooths a wobbly supply (c) beeps for an alarm (d) boosts a small signal
4. 4.What does a fuse do? (a) stores a little charge (b) glows using little power (c) senses how bright it is (d) blows if current is high
5. 5.🧩 Which component is a resistance knob? (a) transistor (b) motor (c) LED (d) potentiometer
6. 6.🧩 Which component lets current go one way? (a) capacitor (b) transistor (c) diode (d) thermistor
7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
8. 8.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) makes things spin (d) has coloured bands
9. 9.🧩 Which component blows if current is high? (a) diode (b) resistor (c) potentiometer (d) fuse
10. 10.True or false: a buzzer makes a beeping sound. (a) False (b) True
11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
12. 12.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
13. 13.What does a motor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) senses how bright it is (d) blows if current is high
14. 14.🧩 Which component stores a little charge? (a) transistor (b) potentiometer (c) resistor (d) capacitor
15. 15.True or false: a potentiometer boosts a small signal. (a) True (b) False
16. 16.🧩 Which component glows using little power? (a) resistor (b) diode (c) LED (d) motor
17. 17.What does an LED do? (a) senses how bright it is (b) limits the current (c) has coloured bands (d) glows using little power
18. 18.🧩 Which component has coloured bands? (a) diode (b) resistor (c) fuse (d) LED
19. 19.What does an LDR do? (a) senses how hot it is (b) beeps for an alarm (c) makes things spin (d) senses how bright it is
20. 20.What does a transistor do? (a) stores a little charge (b) senses how hot it is (c) glows using little power (d) boosts a small signal
21. 21.True or false: an LDR limits the current. (a) True (b) False
22. 22.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) stores a little charge (d) boosts a small signal
23. 23.What does a motor do? (a) smooths a wobbly supply (b) blows if current is high (c) stores a little charge (d) makes things spin
24. 24.True or false: an LED glows using little power. (a) False (b) True
25. 25.🧩 Which component smooths a wobbly supply? (a) LED (b) motor (c) capacitor (d) diode
26. 26.True or false: a resistor has coloured bands. (a) False (b) True
27. 27.True or false: a capacitor is a resistance knob. (a) True (b) False
28. 28.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) lets current go one way (d) senses how bright it is
29. 29.True or false: a diode smooths a wobbly supply. (a) False (b) True
30. 30.True or false: a potentiometer is a resistance knob. (a) True (b) False
31. 31.True or false: an LDR beeps for an alarm. (a) False (b) True
32. 32.🧩 Which component makes a beeping sound? (a) capacitor (b) LDR (c) diode (d) buzzer
33. 33.What does a resistor do? (a) boosts a small signal (b) has coloured bands (c) smooths a wobbly supply (d) beeps for an alarm
34. 34.What does a buzzer do? (a) blows if current is high (b) beeps for an alarm (c) has coloured bands (d) lets current go one way
35. 35.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) fuse (d) buzzer
36. 36.🧩 Which component makes things spin? (a) diode (b) buzzer (c) LED (d) motor
37. 37.True or false: a thermistor blows if current is high. (a) True (b) False
38. 38.True or false: an LED boosts a small signal. (a) False (b) True
39. 39.What does a thermistor do? (a) senses how bright it is (b) is a resistance knob (c) boosts a small signal (d) senses how hot it is
40. 40.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) diode (d) capacitor

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