Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 514 · 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) diode (b) motor (c) capacitor (d) LDR
2. 2.What does a resistor do? (a) has coloured bands (b) boosts a small signal (c) smooths a wobbly supply (d) beeps for an alarm
3. 3.What does a diode do? (a) stores a little charge (b) lets current go one way (c) limits the current (d) senses how bright it is
4. 4.What does a motor do? (a) lets current go one way (b) stores a little charge (c) limits the current (d) makes things spin
5. 5.🧩 Which component beeps for an alarm? (a) diode (b) capacitor (c) thermistor (d) buzzer
6. 6.🧩 Which component makes things spin? (a) buzzer (b) LED (c) potentiometer (d) motor
7. 7.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) capacitor (d) LDR
8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
9. 9.🧩 Which component blows if current is high? (a) motor (b) fuse (c) resistor (d) buzzer
10. 10.🧩 Which component senses how hot it is? (a) LDR (b) motor (c) LED (d) thermistor
11. 11.🧩 Which component makes a beeping sound? (a) resistor (b) transistor (c) LDR (d) buzzer
12. 12.True or false: a buzzer makes a beeping sound. (a) False (b) True
13. 13.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
14. 14.What does a potentiometer do? (a) smooths a wobbly supply (b) limits the current (c) blows if current is high (d) is a resistance knob
15. 15.What does a capacitor do? (a) limits the current (b) has coloured bands (c) stores a little charge (d) blows if current is high
16. 16.🧩 Which component lets current go one way? (a) resistor (b) diode (c) fuse (d) thermistor
17. 17.🧩 Which component limits the current? (a) motor (b) capacitor (c) resistor (d) LED
18. 18.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) senses how hot it is (d) beeps for an alarm
19. 19.What does a capacitor do? (a) turns a fan or wheels (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
20. 20.🧩 Which component has coloured bands? (a) diode (b) fuse (c) resistor (d) potentiometer
21. 21.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) smooths a wobbly supply (d) boosts a small signal
22. 22.True or false: an LDR senses how bright it is. (a) True (b) False
23. 23.🧩 Which component turns a fan or wheels? (a) transistor (b) LED (c) motor (d) LDR
24. 24.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
25. 25.True or false: a fuse has coloured bands. (a) True (b) False
26. 26.True or false: a motor boosts a small signal. (a) True (b) False
27. 27.True or false: a thermistor boosts a small signal. (a) True (b) False
28. 28.True or false: a resistor limits the current. (a) True (b) False
29. 29.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) lets current go one way
30. 30.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) limits the current (d) beeps for an alarm
31. 31.True or false: a buzzer lets current go one way. (a) True (b) False
32. 32.True or false: a resistor has coloured bands. (a) False (b) True
33. 33.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) senses how hot it is (d) lets current go one way
34. 34.True or false: a thermistor senses how hot it is. (a) True (b) False
35. 35.What does a motor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) glows using little power (d) stores a little charge
36. 36.What does an LED do? (a) smooths a wobbly supply (b) lets current go one way (c) glows using little power (d) makes things spin
37. 37.True or false: a fuse blows if current is high. (a) True (b) False
38. 38.True or false: a buzzer beeps for an alarm. (a) False (b) True
39. 39.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) LDR (d) transistor
40. 40.True or false: a diode lets current go one way. (a) True (b) False

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