Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 378 · 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.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
2. 2.True or false: a buzzer glows using little power. (a) True (b) False
3. 3.🧩 Which component makes a beeping sound? (a) thermistor (b) diode (c) buzzer (d) potentiometer
4. 4.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) turns a fan or wheels (d) limits the current
5. 5.True or false: a capacitor stores a little charge. (a) False (b) True
6. 6.🧩 Which component senses how hot it is? (a) capacitor (b) motor (c) transistor (d) thermistor
7. 7.🧩 Which component limits the current? (a) buzzer (b) diode (c) resistor (d) motor
8. 8.What does a diode do? (a) smooths a wobbly supply (b) has coloured bands (c) limits the current (d) lets current go one way
9. 9.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
10. 10.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) buzzer (d) resistor
11. 11.What does a potentiometer do? (a) has coloured bands (b) makes things spin (c) is a resistance knob (d) lets current go one way
12. 12.What does a buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) lets current go one way (d) blows if current is high
13. 13.🧩 Which component has coloured bands? (a) motor (b) resistor (c) capacitor (d) buzzer
14. 14.🧩 Which component smooths a wobbly supply? (a) diode (b) motor (c) LED (d) capacitor
15. 15.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) fuse (d) resistor
16. 16.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) limits the current (d) glows using little power
17. 17.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) glows using little power (d) blows if current is high
18. 18.True or false: a resistor makes a beeping sound. (a) True (b) False
19. 19.True or false: a resistor smooths a wobbly supply. (a) True (b) False
20. 20.🧩 Which component senses how bright it is? (a) LED (b) motor (c) LDR (d) capacitor
21. 21.True or false: an LED is a resistance knob. (a) True (b) False
22. 22.What does a fuse do? (a) makes things spin (b) stores a little charge (c) blows if current is high (d) senses how hot it is
23. 23.What does a resistor do? (a) is a resistance knob (b) limits the current (c) makes things spin (d) makes a beeping sound
24. 24.True or false: a diode lets current go one way. (a) False (b) True
25. 25.True or false: a capacitor senses how bright it is. (a) False (b) True
26. 26.True or false: a thermistor is a resistance knob. (a) True (b) False
27. 27.True or false: a resistor limits the current. (a) True (b) False
28. 28.What does a thermistor do? (a) beeps for an alarm (b) senses how hot it is (c) stores a little charge (d) smooths a wobbly supply
29. 29.True or false: a resistor has coloured bands. (a) True (b) False
30. 30.True or false: a capacitor turns a fan or wheels. (a) True (b) False
31. 31.True or false: a transistor boosts a small signal. (a) True (b) False
32. 32.True or false: a fuse blows if current is high. (a) False (b) True
33. 33.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) senses how bright it is (d) turns a fan or wheels
34. 34.What does a motor do? (a) makes things spin (b) makes a beeping sound (c) smooths a wobbly supply (d) stores a little charge
35. 35.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
36. 36.🧩 Which component blows if current is high? (a) buzzer (b) transistor (c) fuse (d) thermistor
37. 37.True or false: a diode senses how bright it is. (a) True (b) False
38. 38.🧩 Which component glows using little power? (a) LDR (b) potentiometer (c) thermistor (d) LED
39. 39.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) glows using little power
40. 40.True or false: a thermistor senses how hot it is. (a) True (b) False

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