Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 309 · 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 lets current go one way? (a) resistor (b) capacitor (c) motor (d) diode
2. 2.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) senses how bright it is (d) blows if current is high
3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) fuse (d) resistor
4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
5. 5.What does a resistor do? (a) senses how hot it is (b) has coloured bands (c) glows using little power (d) makes a beeping sound
6. 6.True or false: an LDR beeps for an alarm. (a) False (b) True
7. 7.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) resistor (c) capacitor (d) fuse
8. 8.🧩 Which component makes things spin? (a) thermistor (b) diode (c) buzzer (d) motor
9. 9.🧩 Which component makes a beeping sound? (a) transistor (b) fuse (c) LED (d) buzzer
10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
12. 12.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) LED (d) fuse
13. 13.True or false: a resistor senses how hot it is. (a) False (b) True
14. 14.What does a buzzer do? (a) makes a beeping sound (b) limits the current (c) stores a little charge (d) has coloured bands
15. 15.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) diode (d) potentiometer
16. 16.What does a motor do? (a) limits the current (b) makes things spin (c) is a resistance knob (d) glows using little power
17. 17.What does a transistor do? (a) glows using little power (b) lets current go one way (c) has coloured bands (d) boosts a small signal
18. 18.True or false: a capacitor senses how bright it is. (a) True (b) False
19. 19.🧩 Which component limits the current? (a) resistor (b) motor (c) transistor (d) buzzer
20. 20.🧩 Which component beeps for an alarm? (a) motor (b) diode (c) transistor (d) buzzer
21. 21.What does a resistor do? (a) lets current go one way (b) boosts a small signal (c) limits the current (d) beeps for an alarm
22. 22.🧩 Which component turns a fan or wheels? (a) LDR (b) potentiometer (c) motor (d) fuse
23. 23.True or false: a motor makes things spin. (a) False (b) True
24. 24.True or false: a potentiometer is a resistance knob. (a) True (b) False
25. 25.What does a fuse do? (a) has coloured bands (b) glows using little power (c) blows if current is high (d) is a resistance knob
26. 26.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) motor (d) potentiometer
27. 27.True or false: a fuse stores a little charge. (a) False (b) True
28. 28.What does a potentiometer do? (a) makes a beeping sound (b) smooths a wobbly supply (c) senses how hot it is (d) is a resistance knob
29. 29.What does an LDR do? (a) limits the current (b) turns a fan or wheels (c) senses how bright it is (d) makes a beeping sound
30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
31. 31.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) stores a little charge (d) smooths a wobbly supply
32. 32.True or false: a potentiometer stores a little charge. (a) True (b) False
33. 33.True or false: a motor has coloured bands. (a) True (b) False
34. 34.🧩 Which component glows using little power? (a) resistor (b) motor (c) potentiometer (d) LED
35. 35.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) transistor (d) diode
36. 36.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) motor (d) resistor
37. 37.True or false: a fuse blows if current is high. (a) False (b) True
38. 38.True or false: an LDR limits the current. (a) True (b) False
39. 39.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) smooths a wobbly supply (d) lets current go one way
40. 40.True or false: a resistor beeps for an alarm. (a) True (b) False

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