Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 65 · 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.What does a thermistor do? (a) is a resistance knob (b) blows if current is high (c) senses how hot it is (d) makes a beeping sound
2. 2.True or false: a transistor has coloured bands. (a) True (b) False
3. 3.What does an LED do? (a) glows using little power (b) is a resistance knob (c) makes things spin (d) limits the current
4. 4.🧩 Which component makes a beeping sound? (a) thermistor (b) capacitor (c) diode (d) buzzer
5. 5.What does a transistor do? (a) stores a little charge (b) boosts a small signal (c) senses how bright it is (d) smooths a wobbly supply
6. 6.True or false: an LDR senses how bright it is. (a) True (b) False
7. 7.🧩 Which component stores a little charge? (a) potentiometer (b) LDR (c) thermistor (d) capacitor
8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
10. 10.🧩 Which component makes things spin? (a) diode (b) potentiometer (c) LED (d) motor
11. 11.What does a resistor do? (a) makes a beeping sound (b) is a resistance knob (c) limits the current (d) makes things spin
12. 12.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) buzzer (d) thermistor
13. 13.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
14. 14.🧩 Which component has coloured bands? (a) LDR (b) transistor (c) resistor (d) LED
15. 15.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) fuse (d) transistor
16. 16.True or false: a thermistor has coloured bands. (a) True (b) False
17. 17.True or false: a fuse blows if current is high. (a) True (b) False
18. 18.What does a buzzer do? (a) makes things spin (b) turns a fan or wheels (c) makes a beeping sound (d) blows if current is high
19. 19.True or false: an LDR limits the current. (a) True (b) False
20. 20.True or false: a motor makes things spin. (a) False (b) True
21. 21.What does an LDR do? (a) is a resistance knob (b) beeps for an alarm (c) glows using little power (d) senses how bright it is
22. 22.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) LDR (d) transistor
23. 23.True or false: an LED makes things spin. (a) True (b) False
24. 24.True or false: a diode makes a beeping sound. (a) False (b) True
25. 25.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
26. 26.True or false: a capacitor stores a little charge. (a) False (b) True
27. 27.True or false: a motor turns a fan or wheels. (a) True (b) False
28. 28.What does a potentiometer do? (a) senses how hot it is (b) makes things spin (c) beeps for an alarm (d) is a resistance knob
29. 29.What does a diode do? (a) blows if current is high (b) lets current go one way (c) beeps for an alarm (d) has coloured bands
30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
31. 31.True or false: an LED glows using little power. (a) True (b) False
32. 32.🧩 Which component lets current go one way? (a) potentiometer (b) fuse (c) diode (d) LED
33. 33.🧩 Which component smooths a wobbly supply? (a) motor (b) resistor (c) buzzer (d) capacitor
34. 34.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) turns a fan or wheels (d) smooths a wobbly supply
35. 35.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) LED (d) motor
36. 36.What does a buzzer do? (a) limits the current (b) has coloured bands (c) beeps for an alarm (d) lets current go one way
37. 37.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) senses how hot it is (d) makes things spin
38. 38.🧩 Which component is a resistance knob? (a) fuse (b) motor (c) capacitor (d) potentiometer
39. 39.🧩 Which component limits the current? (a) buzzer (b) diode (c) capacitor (d) resistor
40. 40.True or false: a diode limits the current. (a) True (b) False

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