Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 396 · 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 fuse do? (a) turns a fan or wheels (b) limits the current (c) is a resistance knob (d) blows if current is high
2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
4. 4.What does a potentiometer do? (a) limits the current (b) senses how bright it is (c) smooths a wobbly supply (d) is a resistance knob
5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
6. 6.🧩 Which component senses how bright it is? (a) potentiometer (b) resistor (c) LDR (d) motor
7. 7.🧩 Which component stores a little charge? (a) potentiometer (b) resistor (c) capacitor (d) thermistor
8. 8.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) buzzer (d) transistor
9. 9.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
10. 10.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) resistor (d) LED
11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
12. 12.What does a thermistor do? (a) has coloured bands (b) stores a little charge (c) senses how hot it is (d) turns a fan or wheels
13. 13.True or false: a buzzer makes a beeping sound. (a) False (b) True
14. 14.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) diode (d) resistor
15. 15.What does a buzzer do? (a) glows using little power (b) senses how hot it is (c) beeps for an alarm (d) blows if current is high
16. 16.🧩 Which component limits the current? (a) LDR (b) resistor (c) LED (d) capacitor
17. 17.🧩 Which component smooths a wobbly supply? (a) resistor (b) LDR (c) potentiometer (d) capacitor
18. 18.True or false: a capacitor stores a little charge. (a) True (b) False
19. 19.🧩 Which component lets current go one way? (a) diode (b) motor (c) transistor (d) resistor
20. 20.What does a resistor do? (a) glows using little power (b) blows if current is high (c) makes things spin (d) limits the current
21. 21.True or false: a motor makes things spin. (a) False (b) True
22. 22.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) turns a fan or wheels (d) blows if current is high
23. 23.What does an LED do? (a) lets current go one way (b) senses how hot it is (c) is a resistance knob (d) glows using little power
24. 24.True or false: an LED glows using little power. (a) False (b) True
25. 25.What does a capacitor do? (a) limits the current (b) lets current go one way (c) stores a little charge (d) turns a fan or wheels
26. 26.True or false: a motor has coloured bands. (a) True (b) False
27. 27.🧩 Which component glows using little power? (a) potentiometer (b) fuse (c) LED (d) resistor
28. 28.True or false: a thermistor makes a beeping sound. (a) False (b) True
29. 29.True or false: a motor turns a fan or wheels. (a) False (b) True
30. 30.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) fuse (d) diode
31. 31.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) beeps for an alarm (d) has coloured bands
32. 32.True or false: a potentiometer senses how bright it is. (a) True (b) False
33. 33.True or false: a resistor stores a little charge. (a) True (b) False
34. 34.True or false: a fuse makes things spin. (a) False (b) True
35. 35.What does a motor do? (a) makes a beeping sound (b) blows if current is high (c) turns a fan or wheels (d) beeps for an alarm
36. 36.True or false: an LED has coloured bands. (a) True (b) False
37. 37.True or false: a buzzer limits the current. (a) True (b) False
38. 38.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
39. 39.What does a resistor do? (a) makes a beeping sound (b) lets current go one way (c) has coloured bands (d) smooths a wobbly supply
40. 40.🧩 Which component blows if current is high? (a) buzzer (b) LED (c) thermistor (d) fuse

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