Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 153 · 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 an LED do? (a) has coloured bands (b) is a resistance knob (c) stores a little charge (d) glows using little power
2. 2.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) fuse (d) diode
3. 3.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) transistor (d) LDR
4. 4.True or false: a buzzer blows if current is high. (a) True (b) False
5. 5.🧩 Which component lets current go one way? (a) capacitor (b) motor (c) buzzer (d) diode
6. 6.True or false: a diode senses how hot it is. (a) False (b) True
7. 7.What does a potentiometer do? (a) senses how hot it is (b) is a resistance knob (c) beeps for an alarm (d) makes things spin
8. 8.What does a resistor do? (a) makes a beeping sound (b) glows using little power (c) limits the current (d) boosts a small signal
9. 9.True or false: a diode makes a beeping sound. (a) False (b) True
10. 10.True or false: an LED limits the current. (a) True (b) False
11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
12. 12.What does a transistor do? (a) glows using little power (b) beeps for an alarm (c) lets current go one way (d) boosts a small signal
13. 13.True or false: an LED is a resistance knob. (a) False (b) True
14. 14.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
15. 15.What does an LDR do? (a) boosts a small signal (b) makes things spin (c) senses how bright it is (d) lets current go one way
16. 16.What does a diode do? (a) beeps for an alarm (b) smooths a wobbly supply (c) lets current go one way (d) boosts a small signal
17. 17.True or false: a capacitor stores a little charge. (a) False (b) True
18. 18.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) fuse (d) thermistor
19. 19.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) senses how hot it is (d) glows using little power
20. 20.🧩 Which component makes a beeping sound? (a) LED (b) capacitor (c) buzzer (d) potentiometer
21. 21.True or false: an LDR boosts a small signal. (a) True (b) False
22. 22.True or false: a fuse has coloured bands. (a) False (b) True
23. 23.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) resistor (d) potentiometer
24. 24.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) capacitor (d) diode
25. 25.🧩 Which component glows using little power? (a) LDR (b) diode (c) LED (d) resistor
26. 26.True or false: a resistor turns a fan or wheels. (a) True (b) False
27. 27.True or false: an LED lets current go one way. (a) True (b) False
28. 28.True or false: a motor blows if current is high. (a) True (b) False
29. 29.🧩 Which component stores a little charge? (a) resistor (b) fuse (c) capacitor (d) potentiometer
30. 30.What does a motor do? (a) makes a beeping sound (b) beeps for an alarm (c) makes things spin (d) boosts a small signal
31. 31.What does a capacitor do? (a) makes things spin (b) limits the current (c) stores a little charge (d) lets current go one way
32. 32.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) senses how hot it is (d) beeps for an alarm
33. 33.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) limits the current (d) beeps for an alarm
34. 34.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) senses how bright it is (d) limits the current
35. 35.What does a thermistor do? (a) is a resistance knob (b) lets current go one way (c) glows using little power (d) senses how hot it is
36. 36.🧩 Which component senses how hot it is? (a) resistor (b) transistor (c) thermistor (d) LDR
37. 37.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
38. 38.True or false: a fuse blows if current is high. (a) True (b) False
39. 39.True or false: a transistor boosts a small signal. (a) False (b) True
40. 40.True or false: a potentiometer has coloured bands. (a) False (b) True

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