Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 497 · 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 LDR do? (a) stores a little charge (b) senses how bright it is (c) smooths a wobbly supply (d) boosts a small signal
2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
3. 3.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LED (d) transistor
4. 4.What does a buzzer do? (a) has coloured bands (b) boosts a small signal (c) senses how bright it is (d) makes a beeping sound
5. 5.🧩 Which component blows if current is high? (a) fuse (b) diode (c) capacitor (d) LDR
6. 6.True or false: a motor limits the current. (a) True (b) False
7. 7.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) transistor (d) motor
8. 8.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) diode (d) resistor
9. 9.What does a capacitor do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) beeps for an alarm
10. 10.True or false: a transistor lets current go one way. (a) False (b) True
11. 11.🧩 Which component makes things spin? (a) motor (b) LED (c) buzzer (d) resistor
12. 12.What does a fuse do? (a) makes things spin (b) senses how hot it is (c) blows if current is high (d) limits the current
13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
14. 14.True or false: a resistor smooths a wobbly supply. (a) True (b) False
15. 15.🧩 Which component glows using little power? (a) resistor (b) LED (c) transistor (d) buzzer
16. 16.What does a capacitor do? (a) glows using little power (b) senses how hot it is (c) smooths a wobbly supply (d) beeps for an alarm
17. 17.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
18. 18.True or false: a transistor blows if current is high. (a) False (b) True
19. 19.What does a transistor do? (a) senses how hot it is (b) senses how bright it is (c) is a resistance knob (d) boosts a small signal
20. 20.True or false: a transistor boosts a small signal. (a) True (b) False
21. 21.True or false: a diode is a resistance knob. (a) True (b) False
22. 22.🧩 Which component senses how bright it is? (a) diode (b) thermistor (c) LED (d) LDR
23. 23.What does a potentiometer do? (a) glows using little power (b) smooths a wobbly supply (c) lets current go one way (d) is a resistance knob
24. 24.True or false: a resistor limits the current. (a) True (b) False
25. 25.True or false: a buzzer blows if current is high. (a) False (b) True
26. 26.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) LED (d) resistor
27. 27.What does a motor do? (a) stores a little charge (b) makes things spin (c) boosts a small signal (d) limits the current
28. 28.🧩 Which component lets current go one way? (a) transistor (b) motor (c) diode (d) LDR
29. 29.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) buzzer (d) LED
30. 30.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) buzzer (d) motor
31. 31.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) smooths a wobbly supply (d) has coloured bands
32. 32.True or false: a potentiometer lets current go one way. (a) False (b) True
33. 33.True or false: a diode smooths a wobbly supply. (a) False (b) True
34. 34.🧩 Which component limits the current? (a) LED (b) resistor (c) potentiometer (d) capacitor
35. 35.What does a motor do? (a) senses how bright it is (b) lets current go one way (c) senses how hot it is (d) turns a fan or wheels
36. 36.True or false: a buzzer lets current go one way. (a) True (b) False
37. 37.True or false: a thermistor makes a beeping sound. (a) True (b) False
38. 38.True or false: an LED stores a little charge. (a) False (b) True
39. 39.🧩 Which component makes a beeping sound? (a) diode (b) transistor (c) buzzer (d) capacitor
40. 40.True or false: an LDR beeps for an alarm. (a) False (b) True

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