Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 679 · 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 smooths a wobbly supply? (a) capacitor (b) buzzer (c) diode (d) thermistor
2. 2.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) potentiometer (d) resistor
3. 3.What does a thermistor do? (a) beeps for an alarm (b) limits the current (c) makes things spin (d) senses how hot it is
4. 4.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) limits the current
5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
6. 6.True or false: a buzzer makes a beeping sound. (a) True (b) False
7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
8. 8.What does a resistor do? (a) makes a beeping sound (b) stores a little charge (c) has coloured bands (d) turns a fan or wheels
9. 9.What does an LDR do? (a) is a resistance knob (b) senses how hot it is (c) makes a beeping sound (d) senses how bright it is
10. 10.🧩 Which component lets current go one way? (a) thermistor (b) transistor (c) diode (d) motor
11. 11.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) resistor (d) thermistor
12. 12.🧩 Which component glows using little power? (a) capacitor (b) potentiometer (c) LED (d) motor
13. 13.True or false: a diode is a resistance knob. (a) True (b) False
14. 14.True or false: a transistor beeps for an alarm. (a) True (b) False
15. 15.What does a fuse do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) stores a little charge
16. 16.What does a diode do? (a) boosts a small signal (b) lets current go one way (c) turns a fan or wheels (d) is a resistance knob
17. 17.What does a capacitor do? (a) stores a little charge (b) is a resistance knob (c) senses how hot it is (d) beeps for an alarm
18. 18.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
19. 19.What does a resistor do? (a) blows if current is high (b) limits the current (c) makes a beeping sound (d) stores a little charge
20. 20.What does a motor do? (a) lets current go one way (b) glows using little power (c) makes things spin (d) limits the current
21. 21.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) glows using little power (d) lets current go one way
22. 22.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) LDR (d) capacitor
23. 23.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
24. 24.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) boosts a small signal (d) makes a beeping sound
25. 25.🧩 Which component is a resistance knob? (a) LED (b) LDR (c) potentiometer (d) thermistor
26. 26.True or false: a motor beeps for an alarm. (a) True (b) False
27. 27.🧩 Which component stores a little charge? (a) resistor (b) capacitor (c) thermistor (d) buzzer
28. 28.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) makes things spin (d) senses how hot it is
29. 29.🧩 Which component limits the current? (a) fuse (b) buzzer (c) resistor (d) potentiometer
30. 30.True or false: a fuse makes things spin. (a) False (b) True
31. 31.🧩 Which component turns a fan or wheels? (a) LED (b) capacitor (c) diode (d) motor
32. 32.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) makes a beeping sound (d) senses how hot it is
33. 33.True or false: an LED blows if current is high. (a) False (b) True
34. 34.True or false: an LDR senses how bright it is. (a) False (b) True
35. 35.True or false: an LDR smooths a wobbly supply. (a) True (b) False
36. 36.True or false: a resistor makes things spin. (a) True (b) False
37. 37.What does a fuse do? (a) senses how bright it is (b) lets current go one way (c) makes things spin (d) blows if current is high
38. 38.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) potentiometer (d) capacitor
39. 39.True or false: a motor limits the current. (a) True (b) False
40. 40.True or false: a resistor blows if current is high. (a) False (b) True

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