Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 192 · 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 glows using little power? (a) LED (b) capacitor (c) buzzer (d) diode
2. 2.True or false: a potentiometer glows using little power. (a) False (b) True
3. 3.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) beeps for an alarm (d) stores a little charge
4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
6. 6.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) LDR (d) fuse
7. 7.🧩 Which component stores a little charge? (a) transistor (b) fuse (c) capacitor (d) motor
8. 8.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) senses how hot it is (d) limits the current
9. 9.True or false: a potentiometer limits the current. (a) False (b) True
10. 10.What does a resistor do? (a) glows using little power (b) makes things spin (c) makes a beeping sound (d) limits the current
11. 11.What does a thermistor do? (a) beeps for an alarm (b) glows using little power (c) senses how hot it is (d) makes things spin
12. 12.🧩 Which component turns a fan or wheels? (a) thermistor (b) LED (c) capacitor (d) motor
13. 13.True or false: a fuse blows if current is high. (a) False (b) True
14. 14.What does an LDR do? (a) glows using little power (b) smooths a wobbly supply (c) makes things spin (d) senses how bright it is
15. 15.🧩 Which component senses how bright it is? (a) capacitor (b) diode (c) resistor (d) LDR
16. 16.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) diode (d) LED
17. 17.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
18. 18.True or false: a diode blows if current is high. (a) False (b) True
19. 19.What does a transistor do? (a) turns a fan or wheels (b) senses how hot it is (c) is a resistance knob (d) boosts a small signal
20. 20.True or false: a buzzer makes a beeping sound. (a) False (b) True
21. 21.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) resistor (d) transistor
22. 22.🧩 Which component limits the current? (a) potentiometer (b) capacitor (c) diode (d) resistor
23. 23.True or false: a transistor limits the current. (a) True (b) False
24. 24.What does a motor do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) lets current go one way
25. 25.🧩 Which component beeps for an alarm? (a) transistor (b) motor (c) capacitor (d) buzzer
26. 26.True or false: a buzzer beeps for an alarm. (a) False (b) True
27. 27.What does a capacitor do? (a) limits the current (b) boosts a small signal (c) smooths a wobbly supply (d) has coloured bands
28. 28.What does a motor do? (a) limits the current (b) makes things spin (c) stores a little charge (d) lets current go one way
29. 29.True or false: an LED senses how bright it is. (a) True (b) False
30. 30.True or false: a capacitor beeps for an alarm. (a) False (b) True
31. 31.🧩 Which component senses how hot it is? (a) transistor (b) LDR (c) capacitor (d) thermistor
32. 32.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) makes things spin (d) turns a fan or wheels
33. 33.True or false: a resistor beeps for an alarm. (a) False (b) True
34. 34.🧩 Which component makes things spin? (a) motor (b) diode (c) resistor (d) thermistor
35. 35.True or false: an LDR limits the current. (a) False (b) True
36. 36.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) smooths a wobbly supply (d) senses how hot it is
37. 37.True or false: a capacitor senses how hot it is. (a) False (b) True
38. 38.What does a capacitor do? (a) stores a little charge (b) limits the current (c) boosts a small signal (d) makes things spin
39. 39.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) makes a beeping sound (d) beeps for an alarm
40. 40.What does an LED do? (a) limits the current (b) has coloured bands (c) glows using little power (d) smooths a wobbly supply

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