Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 133 · 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 an LDR do? (a) glows using little power (b) limits the current (c) turns a fan or wheels (d) senses how bright it is
2. 2.True or false: a thermistor stores a little charge. (a) True (b) False
3. 3.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) capacitor (d) transistor
4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
5. 5.What does a motor do? (a) limits the current (b) has coloured bands (c) stores a little charge (d) turns a fan or wheels
6. 6.True or false: a diode has coloured bands. (a) True (b) False
7. 7.🧩 Which component limits the current? (a) transistor (b) capacitor (c) LED (d) resistor
8. 8.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
9. 9.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) diode (d) potentiometer
10. 10.True or false: a fuse blows if current is high. (a) False (b) True
11. 11.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) fuse (d) resistor
12. 12.What does a resistor do? (a) senses how bright it is (b) limits the current (c) makes a beeping sound (d) glows using little power
13. 13.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) limits the current (d) has coloured bands
14. 14.True or false: a buzzer makes a beeping sound. (a) True (b) False
15. 15.What does a diode do? (a) has coloured bands (b) limits the current (c) senses how bright it is (d) lets current go one way
16. 16.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) beeps for an alarm (d) stores a little charge
17. 17.🧩 Which component lets current go one way? (a) diode (b) resistor (c) transistor (d) motor
18. 18.True or false: a thermistor makes a beeping sound. (a) False (b) True
19. 19.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
20. 20.True or false: a buzzer beeps for an alarm. (a) True (b) False
21. 21.🧩 Which component makes a beeping sound? (a) fuse (b) capacitor (c) LED (d) buzzer
22. 22.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
23. 23.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) boosts a small signal (d) has coloured bands
24. 24.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) fuse (d) motor
25. 25.True or false: a potentiometer senses how bright it is. (a) False (b) True
26. 26.🧩 Which component makes things spin? (a) resistor (b) motor (c) transistor (d) buzzer
27. 27.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) smooths a wobbly supply (d) has coloured bands
28. 28.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) stores a little charge (d) makes things spin
29. 29.True or false: a capacitor stores a little charge. (a) False (b) True
30. 30.🧩 Which component has coloured bands? (a) LDR (b) transistor (c) fuse (d) resistor
31. 31.What does a resistor do? (a) makes things spin (b) has coloured bands (c) lets current go one way (d) makes a beeping sound
32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
33. 33.True or false: a resistor senses how hot it is. (a) True (b) False
34. 34.True or false: a potentiometer beeps for an alarm. (a) True (b) False
35. 35.True or false: a buzzer lets current go one way. (a) True (b) False
36. 36.True or false: an LED glows using little power. (a) False (b) True
37. 37.🧩 Which component senses how bright it is? (a) resistor (b) thermistor (c) LED (d) LDR
38. 38.True or false: a resistor makes a beeping sound. (a) True (b) False
39. 39.What does an LED do? (a) turns a fan or wheels (b) lets current go one way (c) boosts a small signal (d) glows using little power
40. 40.True or false: a resistor stores a little charge. (a) False (b) True

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