Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 298 · 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.True or false: a resistor has coloured bands. (a) True (b) False
2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
4. 4.🧩 Which component makes a beeping sound? (a) capacitor (b) thermistor (c) motor (d) buzzer
5. 5.🧩 Which component senses how bright it is? (a) LED (b) resistor (c) potentiometer (d) LDR
6. 6.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) LED (d) buzzer
7. 7.True or false: an LDR turns a fan or wheels. (a) True (b) False
8. 8.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) diode (d) fuse
9. 9.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) fuse (d) buzzer
10. 10.🧩 Which component beeps for an alarm? (a) resistor (b) diode (c) fuse (d) buzzer
11. 11.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) turns a fan or wheels (d) lets current go one way
12. 12.🧩 Which component limits the current? (a) capacitor (b) fuse (c) buzzer (d) resistor
13. 13.True or false: a transistor boosts a small signal. (a) False (b) True
14. 14.True or false: a resistor limits the current. (a) True (b) False
15. 15.True or false: a motor limits the current. (a) False (b) True
16. 16.True or false: a fuse blows if current is high. (a) False (b) True
17. 17.True or false: a motor senses how bright it is. (a) True (b) False
18. 18.True or false: a transistor limits the current. (a) True (b) False
19. 19.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) buzzer (d) thermistor
20. 20.What does a thermistor do? (a) senses how bright it is (b) boosts a small signal (c) senses how hot it is (d) lets current go one way
21. 21.True or false: a motor glows using little power. (a) True (b) False
22. 22.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
23. 23.What does a diode do? (a) blows if current is high (b) lets current go one way (c) makes a beeping sound (d) beeps for an alarm
24. 24.🧩 Which component turns a fan or wheels? (a) transistor (b) thermistor (c) motor (d) resistor
25. 25.What does a fuse do? (a) has coloured bands (b) smooths a wobbly supply (c) glows using little power (d) blows if current is high
26. 26.What does a capacitor do? (a) makes a beeping sound (b) senses how bright it is (c) stores a little charge (d) glows using little power
27. 27.🧩 Which component makes things spin? (a) transistor (b) LDR (c) fuse (d) motor
28. 28.🧩 Which component has coloured bands? (a) resistor (b) transistor (c) fuse (d) LDR
29. 29.True or false: a motor boosts a small signal. (a) False (b) True
30. 30.True or false: a potentiometer senses how bright it is. (a) False (b) True
31. 31.What does a resistor do? (a) lets current go one way (b) senses how bright it is (c) has coloured bands (d) makes a beeping sound
32. 32.True or false: an LDR blows if current is high. (a) False (b) True
33. 33.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) has coloured bands (d) blows if current is high
34. 34.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) senses how bright it is (d) is a resistance knob
35. 35.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
36. 36.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) glows using little power (d) stores a little charge
37. 37.What does a capacitor do? (a) glows using little power (b) beeps for an alarm (c) lets current go one way (d) smooths a wobbly supply
38. 38.🧩 Which component lets current go one way? (a) resistor (b) diode (c) transistor (d) LED
39. 39.What does a transistor do? (a) senses how hot it is (b) makes things spin (c) boosts a small signal (d) glows using little power
40. 40.True or false: a resistor glows using little power. (a) False (b) True

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