Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 247 · 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.What does a transistor do? (a) makes things spin (b) is a resistance knob (c) blows if current is high (d) boosts a small signal
2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
3. 3.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) makes things spin (d) stores a little charge
4. 4.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) capacitor (d) resistor
5. 5.True or false: a capacitor has coloured bands. (a) True (b) False
6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
7. 7.What does a motor do? (a) limits the current (b) glows using little power (c) beeps for an alarm (d) makes things spin
8. 8.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) fuse (d) buzzer
9. 9.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) glows using little power (d) turns a fan or wheels
10. 10.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) motor (d) resistor
11. 11.🧩 Which component makes a beeping sound? (a) diode (b) motor (c) buzzer (d) LDR
12. 12.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) resistor (d) potentiometer
13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
14. 14.What does an LDR do? (a) has coloured bands (b) beeps for an alarm (c) is a resistance knob (d) senses how bright it is
15. 15.What does a buzzer do? (a) glows using little power (b) senses how hot it is (c) beeps for an alarm (d) blows if current is high
16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
17. 17.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) transistor (d) thermistor
18. 18.True or false: an LDR turns a fan or wheels. (a) False (b) True
19. 19.🧩 Which component smooths a wobbly supply? (a) resistor (b) motor (c) capacitor (d) buzzer
20. 20.True or false: a diode lets current go one way. (a) False (b) True
21. 21.🧩 Which component limits the current? (a) motor (b) fuse (c) resistor (d) transistor
22. 22.True or false: a transistor turns a fan or wheels. (a) False (b) True
23. 23.What does a diode do? (a) limits the current (b) senses how bright it is (c) senses how hot it is (d) lets current go one way
24. 24.🧩 Which component boosts a small signal? (a) buzzer (b) LDR (c) transistor (d) diode
25. 25.🧩 Which component senses how bright it is? (a) motor (b) buzzer (c) potentiometer (d) LDR
26. 26.True or false: a diode boosts a small signal. (a) True (b) False
27. 27.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) transistor (d) capacitor
28. 28.True or false: a diode makes a beeping sound. (a) True (b) False
29. 29.True or false: an LED limits the current. (a) True (b) False
30. 30.What does a resistor do? (a) has coloured bands (b) glows using little power (c) senses how hot it is (d) senses how bright it is
31. 31.True or false: an LED boosts a small signal. (a) True (b) False
32. 32.True or false: an LED lets current go one way. (a) True (b) False
33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
34. 34.What does a thermistor do? (a) has coloured bands (b) beeps for an alarm (c) lets current go one way (d) senses how hot it is
35. 35.True or false: a diode is a resistance knob. (a) False (b) True
36. 36.🧩 Which component makes things spin? (a) buzzer (b) LED (c) motor (d) capacitor
37. 37.What does a buzzer do? (a) smooths a wobbly supply (b) has coloured bands (c) makes a beeping sound (d) turns a fan or wheels
38. 38.True or false: a thermistor is a resistance knob. (a) False (b) True
39. 39.True or false: a buzzer makes a beeping sound. (a) False (b) True
40. 40.True or false: an LDR makes a beeping sound. (a) True (b) False

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