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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 366 · 40 questions
TalentJR

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.

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

Answer key

  1. buzzer
  2. False
  3. a buzzer
  4. store charge briefly
  5. True
  6. motor
  7. stores a little charge
  8. a motor
  9. resistor
  10. False
  11. False
  12. diode
  13. LDR
  14. thermistor
  15. False
  16. False
  17. False
  18. True
  19. True
  20. transistor
  21. turns a fan or wheels
  22. True
  23. resistor
  24. makes things spin
  25. potentiometer
  26. capacitor
  27. glows using little power
  28. False
  29. is a resistance knob
  30. fuse
  31. False
  32. senses how hot it is
  33. True
  34. lets current go one way
  35. False
  36. has coloured bands
  37. smooths a wobbly supply
  38. False
  39. False
  40. capacitor

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