Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 681 · 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 part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
2. 2.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) buzzer (c) LDR (d) capacitor
3. 3.🧩 Which component limits the current? (a) thermistor (b) capacitor (c) potentiometer (d) resistor
4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
5. 5.🧩 Which component turns a fan or wheels? (a) diode (b) resistor (c) thermistor (d) motor
6. 6.What does a capacitor do? (a) has coloured bands (b) limits the current (c) turns a fan or wheels (d) smooths a wobbly supply
7. 7.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) is a resistance knob (d) senses how hot it is
8. 8.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) thermistor (d) motor
9. 9.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) potentiometer (d) transistor
10. 10.What does a resistor do? (a) makes a beeping sound (b) blows if current is high (c) limits the current (d) senses how bright it is
11. 11.True or false: a thermistor makes things spin. (a) True (b) False
12. 12.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) potentiometer (d) motor
13. 13.What does a potentiometer do? (a) turns a fan or wheels (b) limits the current (c) smooths a wobbly supply (d) is a resistance knob
14. 14.True or false: a buzzer turns a fan or wheels. (a) False (b) True
15. 15.🧩 Which component senses how bright it is? (a) LDR (b) diode (c) resistor (d) motor
16. 16.True or false: a buzzer limits the current. (a) True (b) False
17. 17.True or false: a buzzer beeps for an alarm. (a) False (b) True
18. 18.🧩 Which component blows if current is high? (a) LED (b) motor (c) fuse (d) diode
19. 19.What does a buzzer do? (a) limits the current (b) turns a fan or wheels (c) makes a beeping sound (d) boosts a small signal
20. 20.True or false: a diode lets current go one way. (a) False (b) True
21. 21.What does a motor do? (a) makes things spin (b) blows if current is high (c) glows using little power (d) makes a beeping sound
22. 22.True or false: a buzzer has coloured bands. (a) False (b) True
23. 23.🧩 Which component glows using little power? (a) motor (b) diode (c) transistor (d) LED
24. 24.🧩 Which component makes things spin? (a) LED (b) motor (c) resistor (d) thermistor
25. 25.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) LDR (d) transistor
26. 26.True or false: an LDR senses how bright it is. (a) False (b) True
27. 27.True or false: a transistor blows if current is high. (a) True (b) False
28. 28.True or false: a thermistor senses how hot it is. (a) False (b) True
29. 29.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) transistor (d) thermistor
30. 30.True or false: a diode limits the current. (a) True (b) False
31. 31.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) turns a fan or wheels (d) beeps for an alarm
32. 32.True or false: a potentiometer is a resistance knob. (a) True (b) False
33. 33.True or false: a motor turns a fan or wheels. (a) True (b) False
34. 34.True or false: a fuse makes a beeping sound. (a) True (b) False
35. 35.True or false: a capacitor limits the current. (a) True (b) False
36. 36.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) stores a little charge (d) glows using little power
37. 37.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
38. 38.True or false: an LDR beeps for an alarm. (a) True (b) False
39. 39.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) transistor (d) capacitor
40. 40.What does a resistor do? (a) smooths a wobbly supply (b) glows using little power (c) boosts a small signal (d) has coloured bands

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