Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 567 · 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 LED do? (a) smooths a wobbly supply (b) glows using little power (c) stores a little charge (d) is a resistance knob
2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
3. 3.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) limits the current (d) beeps for an alarm
4. 4.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) thermistor (d) LDR
5. 5.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) boosts a small signal (d) stores a little charge
6. 6.True or false: an LED limits the current. (a) True (b) False
7. 7.True or false: a transistor boosts a small signal. (a) False (b) True
8. 8.🧩 Which component makes things spin? (a) capacitor (b) motor (c) fuse (d) resistor
9. 9.True or false: an LED stores a little charge. (a) False (b) True
10. 10.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) buzzer (d) potentiometer
11. 11.🧩 Which component boosts a small signal? (a) diode (b) potentiometer (c) transistor (d) LED
12. 12.🧩 Which component beeps for an alarm? (a) capacitor (b) motor (c) buzzer (d) LDR
13. 13.True or false: an LDR senses how bright it is. (a) True (b) False
14. 14.What does a fuse do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) boosts a small signal
15. 15.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
16. 16.What does a capacitor do? (a) beeps for an alarm (b) senses how hot it is (c) boosts a small signal (d) stores a little charge
17. 17.🧩 Which component makes a beeping sound? (a) motor (b) fuse (c) potentiometer (d) buzzer
18. 18.True or false: a resistor has coloured bands. (a) False (b) True
19. 19.🧩 Which component limits the current? (a) capacitor (b) motor (c) resistor (d) fuse
20. 20.True or false: a resistor limits the current. (a) False (b) True
21. 21.What does a diode do? (a) glows using little power (b) has coloured bands (c) beeps for an alarm (d) lets current go one way
22. 22.True or false: a capacitor blows if current is high. (a) False (b) True
23. 23.What does a capacitor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes a beeping sound (d) turns a fan or wheels
24. 24.What does a motor do? (a) senses how hot it is (b) makes a beeping sound (c) blows if current is high (d) makes things spin
25. 25.🧩 Which component has coloured bands? (a) buzzer (b) fuse (c) resistor (d) thermistor
26. 26.True or false: a potentiometer is a resistance knob. (a) False (b) True
27. 27.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) LED (d) capacitor
28. 28.What does a transistor do? (a) glows using little power (b) smooths a wobbly supply (c) boosts a small signal (d) senses how bright it is
29. 29.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
30. 30.True or false: a buzzer beeps for an alarm. (a) True (b) False
31. 31.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) stores a little charge (d) turns a fan or wheels
32. 32.What does a buzzer do? (a) turns a fan or wheels (b) senses how bright it is (c) makes a beeping sound (d) is a resistance knob
33. 33.🧩 Which component turns a fan or wheels? (a) capacitor (b) resistor (c) buzzer (d) motor
34. 34.True or false: a resistor senses how bright it is. (a) False (b) True
35. 35.What does a potentiometer do? (a) smooths a wobbly supply (b) has coloured bands (c) glows using little power (d) is a resistance knob
36. 36.True or false: a transistor makes a beeping sound. (a) True (b) False
37. 37.True or false: a capacitor makes a beeping sound. (a) True (b) False
38. 38.🧩 Which component is a resistance knob? (a) resistor (b) capacitor (c) potentiometer (d) LED
39. 39.True or false: a capacitor stores a little charge. (a) True (b) False
40. 40.True or false: a potentiometer blows if current is high. (a) True (b) False

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