Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 513 · 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) glows using little power (b) smooths a wobbly supply (c) has coloured bands (d) senses how bright it is
2. 2.True or false: an LDR senses how bright it is. (a) False (b) True
3. 3.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
4. 4.What does a resistor do? (a) senses how bright it is (b) glows using little power (c) limits the current (d) turns a fan or wheels
5. 5.🧩 Which component makes a beeping sound? (a) LED (b) potentiometer (c) buzzer (d) motor
6. 6.What does a diode do? (a) lets current go one way (b) makes things spin (c) boosts a small signal (d) senses how bright it is
7. 7.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) LED (d) buzzer
8. 8.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) buzzer (d) LED
9. 9.True or false: a diode has coloured bands. (a) True (b) False
10. 10.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) motor (d) transistor
11. 11.What does a resistor do? (a) has coloured bands (b) smooths a wobbly supply (c) boosts a small signal (d) is a resistance knob
12. 12.True or false: a resistor senses how bright it is. (a) True (b) False
13. 13.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
14. 14.🧩 Which component makes things spin? (a) transistor (b) capacitor (c) thermistor (d) motor
15. 15.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
16. 16.True or false: a fuse beeps for an alarm. (a) True (b) False
17. 17.True or false: a resistor makes a beeping sound. (a) False (b) True
18. 18.True or false: a diode is a resistance knob. (a) True (b) False
19. 19.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) transistor (d) diode
20. 20.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) potentiometer (d) buzzer
21. 21.What does a buzzer do? (a) blows if current is high (b) boosts a small signal (c) limits the current (d) beeps for an alarm
22. 22.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) motor (d) potentiometer
23. 23.🧩 Which component lets current go one way? (a) LED (b) diode (c) motor (d) capacitor
24. 24.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) transistor (d) fuse
25. 25.True or false: a fuse is a resistance knob. (a) False (b) True
26. 26.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
27. 27.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) senses how hot it is (d) has coloured bands
28. 28.True or false: a resistor is a resistance knob. (a) False (b) True
29. 29.🧩 Which component smooths a wobbly supply? (a) buzzer (b) motor (c) capacitor (d) diode
30. 30.What does a capacitor do? (a) boosts a small signal (b) beeps for an alarm (c) blows if current is high (d) stores a little charge
31. 31.What does a thermistor do? (a) is a resistance knob (b) glows using little power (c) senses how hot it is (d) turns a fan or wheels
32. 32.What does a fuse do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) boosts a small signal
33. 33.True or false: a potentiometer senses how hot it is. (a) True (b) False
34. 34.What does a motor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) is a resistance knob (d) turns a fan or wheels
35. 35.What does a motor do? (a) makes things spin (b) limits the current (c) glows using little power (d) stores a little charge
36. 36.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) LED (d) fuse
37. 37.True or false: an LED glows using little power. (a) True (b) False
38. 38.True or false: a diode smooths a wobbly supply. (a) True (b) False
39. 39.What does a potentiometer do? (a) blows if current is high (b) makes a beeping sound (c) is a resistance knob (d) turns a fan or wheels
40. 40.True or false: an LED smooths a wobbly supply. (a) True (b) False

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