Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 293 · 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 component senses how bright it is? (a) capacitor (b) potentiometer (c) diode (d) LDR
2. 2.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) capacitor (d) thermistor
3. 3.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) resistor (d) potentiometer
4. 4.True or false: a transistor boosts a small signal. (a) False (b) True
5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
7. 7.True or false: a resistor has coloured bands. (a) True (b) False
8. 8.True or false: an LED glows using little power. (a) False (b) True
9. 9.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) fuse (d) potentiometer
10. 10.What does a capacitor do? (a) limits the current (b) glows using little power (c) stores a little charge (d) is a resistance knob
11. 11.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) makes a beeping sound (d) turns a fan or wheels
12. 12.True or false: an LDR makes a beeping sound. (a) False (b) True
13. 13.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
14. 14.What does a fuse do? (a) has coloured bands (b) is a resistance knob (c) glows using little power (d) blows if current is high
15. 15.True or false: a potentiometer is a resistance knob. (a) False (b) True
16. 16.True or false: an LDR glows using little power. (a) True (b) False
17. 17.What does a buzzer do? (a) turns a fan or wheels (b) boosts a small signal (c) lets current go one way (d) makes a beeping sound
18. 18.🧩 Which component blows if current is high? (a) diode (b) motor (c) fuse (d) capacitor
19. 19.True or false: a fuse blows if current is high. (a) True (b) False
20. 20.What does an LED do? (a) senses how hot it is (b) stores a little charge (c) glows using little power (d) is a resistance knob
21. 21.🧩 Which component senses how hot it is? (a) potentiometer (b) resistor (c) thermistor (d) fuse
22. 22.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) potentiometer (d) capacitor
23. 23.What does a transistor do? (a) limits the current (b) has coloured bands (c) glows using little power (d) boosts a small signal
24. 24.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) LED (d) diode
25. 25.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) is a resistance knob (d) limits the current
26. 26.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) is a resistance knob (d) beeps for an alarm
27. 27.True or false: a motor turns a fan or wheels. (a) False (b) True
28. 28.What does a diode do? (a) smooths a wobbly supply (b) limits the current (c) lets current go one way (d) has coloured bands
29. 29.True or false: a motor stores a little charge. (a) False (b) True
30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
31. 31.True or false: a resistor is a resistance knob. (a) False (b) True
32. 32.True or false: an LED senses how bright it is. (a) True (b) False
33. 33.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) stores a little charge (d) blows if current is high
34. 34.What does a resistor do? (a) senses how hot it is (b) has coloured bands (c) turns a fan or wheels (d) makes things spin
35. 35.🧩 Which component glows using little power? (a) LED (b) transistor (c) potentiometer (d) resistor
36. 36.True or false: an LDR has coloured bands. (a) True (b) False
37. 37.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) resistor (d) fuse
38. 38.What does a motor do? (a) is a resistance knob (b) makes a beeping sound (c) smooths a wobbly supply (d) turns a fan or wheels
39. 39.🧩 Which component limits the current? (a) capacitor (b) LED (c) resistor (d) fuse
40. 40.True or false: a transistor glows using little power. (a) False (b) True

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