Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 495 · 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 part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
2. 2.True or false: a diode lets current go one way. (a) False (b) True
3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
5. 5.What does a buzzer do? (a) blows if current is high (b) lets current go one way (c) boosts a small signal (d) beeps for an alarm
6. 6.🧩 Which component limits the current? (a) motor (b) LDR (c) potentiometer (d) resistor
7. 7.What does a diode do? (a) makes a beeping sound (b) senses how bright it is (c) makes things spin (d) lets current go one way
8. 8.What does a thermistor do? (a) is a resistance knob (b) glows using little power (c) blows if current is high (d) senses how hot it is
9. 9.What does a resistor do? (a) boosts a small signal (b) has coloured bands (c) beeps for an alarm (d) smooths a wobbly supply
10. 10.True or false: a potentiometer has coloured bands. (a) True (b) False
11. 11.What does an LED do? (a) stores a little charge (b) lets current go one way (c) turns a fan or wheels (d) glows using little power
12. 12.True or false: a capacitor boosts a small signal. (a) False (b) True
13. 13.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) buzzer (d) LDR
14. 14.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) capacitor (d) potentiometer
15. 15.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) senses how bright it is (d) limits the current
16. 16.🧩 Which component boosts a small signal? (a) fuse (b) resistor (c) transistor (d) capacitor
17. 17.True or false: a resistor has coloured bands. (a) False (b) True
18. 18.True or false: a diode glows using little power. (a) True (b) False
19. 19.True or false: a thermistor turns a fan or wheels. (a) False (b) True
20. 20.True or false: a transistor makes things spin. (a) True (b) False
21. 21.🧩 Which component makes a beeping sound? (a) thermistor (b) potentiometer (c) diode (d) buzzer
22. 22.🧩 Which component smooths a wobbly supply? (a) LED (b) LDR (c) capacitor (d) thermistor
23. 23.🧩 Which component lets current go one way? (a) diode (b) resistor (c) LED (d) motor
24. 24.🧩 Which component glows using little power? (a) capacitor (b) transistor (c) diode (d) LED
25. 25.What does a fuse do? (a) lets current go one way (b) limits the current (c) has coloured bands (d) blows if current is high
26. 26.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) capacitor (d) buzzer
27. 27.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) diode (d) buzzer
28. 28.True or false: a transistor boosts a small signal. (a) False (b) True
29. 29.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) LED (d) potentiometer
30. 30.🧩 Which component beeps for an alarm? (a) motor (b) fuse (c) buzzer (d) LED
31. 31.🧩 Which component makes things spin? (a) motor (b) capacitor (c) transistor (d) LED
32. 32.What does a buzzer do? (a) glows using little power (b) makes a beeping sound (c) senses how hot it is (d) has coloured bands
33. 33.True or false: an LDR senses how bright it is. (a) False (b) True
34. 34.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) boosts a small signal (d) smooths a wobbly supply
35. 35.True or false: a motor turns a fan or wheels. (a) False (b) True
36. 36.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) turns a fan or wheels (d) makes a beeping sound
37. 37.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) buzzer (d) diode
38. 38.What does a potentiometer do? (a) has coloured bands (b) blows if current is high (c) is a resistance knob (d) limits the current
39. 39.True or false: a resistor beeps for an alarm. (a) True (b) False
40. 40.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) motor (d) transistor

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