Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 56 · 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 blows if current is high? (a) transistor (b) potentiometer (c) thermistor (d) fuse
2. 2.🧩 Which component beeps for an alarm? (a) potentiometer (b) LED (c) buzzer (d) resistor
3. 3.True or false: a capacitor makes a beeping sound. (a) True (b) False
4. 4.What does an LDR do? (a) senses how hot it is (b) senses how bright it is (c) blows if current is high (d) limits the current
5. 5.🧩 Which component has coloured bands? (a) transistor (b) resistor (c) buzzer (d) capacitor
6. 6.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how bright it is (d) lets current go one way
7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
8. 8.True or false: a buzzer lets current go one way. (a) False (b) True
9. 9.True or false: a fuse senses how bright it is. (a) True (b) False
10. 10.🧩 Which component glows using little power? (a) LED (b) buzzer (c) thermistor (d) motor
11. 11.What does a motor do? (a) limits the current (b) glows using little power (c) makes things spin (d) stores a little charge
12. 12.What does a fuse do? (a) is a resistance knob (b) makes a beeping sound (c) blows if current is high (d) senses how bright it is
13. 13.🧩 Which component senses how hot it is? (a) capacitor (b) resistor (c) fuse (d) thermistor
14. 14.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) fuse (d) LED
15. 15.What does a motor do? (a) turns a fan or wheels (b) limits the current (c) senses how bright it is (d) lets current go one way
16. 16.🧩 Which component makes things spin? (a) LDR (b) fuse (c) thermistor (d) motor
17. 17.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) fuse (d) motor
18. 18.True or false: an LED limits the current. (a) False (b) True
19. 19.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) glows using little power (d) boosts a small signal
20. 20.What does a resistor do? (a) glows using little power (b) smooths a wobbly supply (c) lets current go one way (d) limits the current
21. 21.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
22. 22.🧩 Which component makes a beeping sound? (a) potentiometer (b) thermistor (c) motor (d) buzzer
23. 23.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
24. 24.True or false: a potentiometer has coloured bands. (a) True (b) False
25. 25.What does a transistor do? (a) beeps for an alarm (b) glows using little power (c) makes things spin (d) boosts a small signal
26. 26.True or false: a transistor has coloured bands. (a) False (b) True
27. 27.True or false: a transistor senses how bright it is. (a) True (b) False
28. 28.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) is a resistance knob (d) turns a fan or wheels
29. 29.True or false: an LDR limits the current. (a) True (b) False
30. 30.True or false: a thermistor turns a fan or wheels. (a) False (b) True
31. 31.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) motor (d) buzzer
32. 32.What does an LED do? (a) glows using little power (b) senses how bright it is (c) smooths a wobbly supply (d) blows if current is high
33. 33.True or false: a motor makes things spin. (a) False (b) True
34. 34.True or false: a thermistor is a resistance knob. (a) True (b) False
35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
36. 36.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) resistor (d) LDR
37. 37.🧩 Which component limits the current? (a) potentiometer (b) resistor (c) LDR (d) transistor
38. 38.True or false: an LDR senses how bright it is. (a) True (b) False
39. 39.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) makes things spin (d) glows using little power
40. 40.True or false: a thermistor limits the current. (a) True (b) False

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