Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 139 · 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 potentiometer is a resistance knob. (a) True (b) False
2. 2.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) stores a little charge (d) senses how bright it is
3. 3.True or false: a transistor makes things spin. (a) False (b) True
4. 4.True or false: a diode glows using little power. (a) True (b) False
5. 5.True or false: a capacitor glows using little power. (a) False (b) True
6. 6.True or false: a thermistor turns a fan or wheels. (a) True (b) False
7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
8. 8.🧩 Which component glows using little power? (a) thermistor (b) diode (c) LED (d) capacitor
9. 9.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
10. 10.True or false: an LED glows using little power. (a) True (b) False
11. 11.True or false: a resistor has coloured bands. (a) False (b) True
12. 12.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) LED (d) thermistor
13. 13.What does a potentiometer do? (a) makes things spin (b) smooths a wobbly supply (c) makes a beeping sound (d) is a resistance knob
14. 14.🧩 Which component blows if current is high? (a) thermistor (b) diode (c) transistor (d) fuse
15. 15.What does a capacitor do? (a) smooths a wobbly supply (b) has coloured bands (c) lets current go one way (d) turns a fan or wheels
16. 16.🧩 Which component senses how bright it is? (a) buzzer (b) capacitor (c) transistor (d) LDR
17. 17.True or false: a fuse limits the current. (a) False (b) True
18. 18.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) makes a beeping sound (d) smooths a wobbly supply
19. 19.True or false: a potentiometer makes things spin. (a) False (b) True
20. 20.What does an LED do? (a) stores a little charge (b) glows using little power (c) limits the current (d) makes a beeping sound
21. 21.What does a fuse do? (a) smooths a wobbly supply (b) makes things spin (c) blows if current is high (d) beeps for an alarm
22. 22.True or false: a capacitor stores a little charge. (a) True (b) False
23. 23.🧩 Which component stores a little charge? (a) fuse (b) LDR (c) potentiometer (d) capacitor
24. 24.True or false: a resistor limits the current. (a) False (b) True
25. 25.True or false: a thermistor limits the current. (a) True (b) False
26. 26.True or false: a fuse blows if current is high. (a) False (b) True
27. 27.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
28. 28.What does a motor do? (a) makes things spin (b) blows if current is high (c) stores a little charge (d) glows using little power
29. 29.🧩 Which component makes a beeping sound? (a) motor (b) thermistor (c) resistor (d) buzzer
30. 30.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) buzzer (d) resistor
31. 31.What does a motor do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) turns a fan or wheels
32. 32.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) senses how bright it is (d) boosts a small signal
33. 33.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) buzzer (d) motor
34. 34.🧩 Which component makes things spin? (a) potentiometer (b) thermistor (c) capacitor (d) motor
35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
36. 36.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) boosts a small signal (d) senses how bright it is
37. 37.What does an LDR do? (a) glows using little power (b) makes things spin (c) senses how bright it is (d) stores a little charge
38. 38.What does a diode do? (a) makes a beeping sound (b) smooths a wobbly supply (c) is a resistance knob (d) lets current go one way
39. 39.🧩 Which component beeps for an alarm? (a) LED (b) resistor (c) thermistor (d) buzzer
40. 40.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) makes things spin (d) is a resistance knob

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