Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 329 · 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.True or false: a motor lets current go one way. (a) False (b) True
2. 2.🧩 Which component beeps for an alarm? (a) potentiometer (b) motor (c) LDR (d) buzzer
3. 3.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) diode (d) resistor
4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
5. 5.🧩 Which component senses how hot it is? (a) resistor (b) capacitor (c) motor (d) thermistor
6. 6.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) limits the current (d) stores a little charge
7. 7.What does a buzzer do? (a) blows if current is high (b) stores a little charge (c) turns a fan or wheels (d) makes a beeping sound
8. 8.🧩 Which component makes things spin? (a) motor (b) LED (c) potentiometer (d) capacitor
9. 9.What does a motor do? (a) limits the current (b) lets current go one way (c) turns a fan or wheels (d) blows if current is high
10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
11. 11.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) is a resistance knob (d) limits the current
12. 12.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) potentiometer (d) resistor
13. 13.What does a resistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) senses how hot it is (d) has coloured bands
14. 14.What does a transistor do? (a) beeps for an alarm (b) is a resistance knob (c) boosts a small signal (d) glows using little power
15. 15.True or false: an LDR makes a beeping sound. (a) True (b) False
16. 16.True or false: a resistor makes things spin. (a) True (b) False
17. 17.True or false: a capacitor glows using little power. (a) False (b) True
18. 18.What does a thermistor do? (a) smooths a wobbly supply (b) makes things spin (c) senses how hot it is (d) stores a little charge
19. 19.True or false: an LDR is a resistance knob. (a) False (b) True
20. 20.🧩 Which component boosts a small signal? (a) resistor (b) thermistor (c) transistor (d) capacitor
21. 21.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
22. 22.True or false: a diode senses how hot it is. (a) True (b) False
23. 23.True or false: an LED glows using little power. (a) False (b) True
24. 24.True or false: an LDR limits the current. (a) True (b) False
25. 25.What does a capacitor do? (a) boosts a small signal (b) is a resistance knob (c) smooths a wobbly supply (d) lets current go one way
26. 26.What does a diode do? (a) smooths a wobbly supply (b) limits the current (c) lets current go one way (d) makes a beeping sound
27. 27.🧩 Which component senses how bright it is? (a) LDR (b) thermistor (c) resistor (d) potentiometer
28. 28.🧩 Which component turns a fan or wheels? (a) fuse (b) LDR (c) LED (d) motor
29. 29.🧩 Which component limits the current? (a) thermistor (b) capacitor (c) resistor (d) LED
30. 30.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
31. 31.What does an LED do? (a) boosts a small signal (b) makes a beeping sound (c) smooths a wobbly supply (d) glows using little power
32. 32.True or false: a resistor boosts a small signal. (a) False (b) True
33. 33.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) resistor (d) capacitor
34. 34.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) capacitor (d) thermistor
35. 35.True or false: a buzzer makes a beeping sound. (a) True (b) False
36. 36.True or false: a resistor has coloured bands. (a) False (b) True
37. 37.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) diode (d) motor
38. 38.What does an LDR do? (a) glows using little power (b) senses how hot it is (c) senses how bright it is (d) lets current go one way
39. 39.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
40. 40.What does a resistor do? (a) limits the current (b) senses how hot it is (c) beeps for an alarm (d) is a resistance knob

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