Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 87 · 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 capacitor do? (a) glows using little power (b) stores a little charge (c) makes a beeping sound (d) is a resistance knob
2. 2.🧩 Which component lets current go one way? (a) motor (b) diode (c) fuse (d) resistor
3. 3.🧩 Which component boosts a small signal? (a) LED (b) resistor (c) potentiometer (d) transistor
4. 4.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) smooths a wobbly supply (d) stores a little charge
5. 5.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) turns a fan or wheels (d) senses how bright it is
6. 6.True or false: a resistor limits the current. (a) True (b) False
7. 7.True or false: a fuse blows if current is high. (a) False (b) True
8. 8.True or false: a resistor makes a beeping sound. (a) True (b) False
9. 9.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) buzzer (d) thermistor
10. 10.What does a resistor do? (a) blows if current is high (b) senses how hot it is (c) has coloured bands (d) beeps for an alarm
11. 11.🧩 Which component makes a beeping sound? (a) transistor (b) capacitor (c) motor (d) buzzer
12. 12.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) diode (d) potentiometer
13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
15. 15.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
16. 16.True or false: a transistor boosts a small signal. (a) False (b) True
17. 17.True or false: a diode beeps for an alarm. (a) True (b) False
18. 18.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) potentiometer (d) diode
19. 19.🧩 Which component makes things spin? (a) transistor (b) fuse (c) resistor (d) motor
20. 20.🧩 Which component has coloured bands? (a) motor (b) resistor (c) diode (d) LDR
21. 21.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) limits the current (d) senses how hot it is
22. 22.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) resistor (d) capacitor
23. 23.True or false: an LED makes a beeping sound. (a) False (b) True
24. 24.🧩 Which component limits the current? (a) diode (b) motor (c) transistor (d) resistor
25. 25.True or false: a buzzer beeps for an alarm. (a) False (b) True
26. 26.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
27. 27.True or false: a transistor smooths a wobbly supply. (a) True (b) False
28. 28.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) stores a little charge (d) has coloured bands
29. 29.What does a buzzer do? (a) senses how hot it is (b) smooths a wobbly supply (c) makes a beeping sound (d) stores a little charge
30. 30.True or false: a thermistor senses how hot it is. (a) False (b) True
31. 31.True or false: a potentiometer stores a little charge. (a) False (b) True
32. 32.What does a potentiometer do? (a) senses how hot it is (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
33. 33.What does a capacitor do? (a) beeps for an alarm (b) senses how hot it is (c) makes things spin (d) smooths a wobbly supply
34. 34.🧩 Which component glows using little power? (a) diode (b) motor (c) LED (d) transistor
35. 35.True or false: a resistor has coloured bands. (a) True (b) False
36. 36.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) is a resistance knob
37. 37.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) makes a beeping sound (d) smooths a wobbly supply
38. 38.True or false: a diode has coloured bands. (a) True (b) False
39. 39.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) transistor (d) motor
40. 40.What does a motor do? (a) stores a little charge (b) is a resistance knob (c) turns a fan or wheels (d) boosts a small signal

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