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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 334 · 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.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) has coloured bands (d) senses how hot it is
  2. 2.🧩 Which component lets current go one way? (a) motor (b) thermistor (c) diode (d) fuse
  3. 3.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) blows if current is high (d) glows using little power
  4. 4.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) diode (d) transistor
  5. 5.True or false: a transistor boosts a small signal. (a) False (b) True
  6. 6.🧩 Which component makes things spin? (a) transistor (b) motor (c) LDR (d) resistor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  8. 8.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) senses how bright it is (d) smooths a wobbly supply
  9. 9.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) diode (d) buzzer
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  11. 11.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) resistor (d) diode
  12. 12.True or false: a motor turns a fan or wheels. (a) False (b) True
  13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  14. 14.🧩 Which component blows if current is high? (a) resistor (b) transistor (c) capacitor (d) fuse
  15. 15.True or false: a potentiometer boosts a small signal. (a) True (b) False
  16. 16.What does a buzzer do? (a) has coloured bands (b) smooths a wobbly supply (c) beeps for an alarm (d) boosts a small signal
  17. 17.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) senses how bright it is (d) limits the current
  18. 18.True or false: an LED glows using little power. (a) False (b) True
  19. 19.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) blows if current is high (d) is a resistance knob
  20. 20.True or false: a diode lets current go one way. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) LED (b) resistor (c) buzzer (d) motor
  22. 22.What does a motor do? (a) senses how bright it is (b) beeps for an alarm (c) turns a fan or wheels (d) stores a little charge
  23. 23.True or false: a resistor turns a fan or wheels. (a) True (b) False
  24. 24.What does a capacitor do? (a) turns a fan or wheels (b) limits the current (c) beeps for an alarm (d) stores a little charge
  25. 25.True or false: a transistor turns a fan or wheels. (a) False (b) True
  26. 26.True or false: a buzzer beeps for an alarm. (a) False (b) True
  27. 27.True or false: a buzzer stores a little charge. (a) False (b) True
  28. 28.What does an LDR do? (a) turns a fan or wheels (b) beeps for an alarm (c) stores a little charge (d) senses how bright it is
  29. 29.True or false: a potentiometer is a resistance knob. (a) True (b) False
  30. 30.🧩 Which component boosts a small signal? (a) resistor (b) diode (c) buzzer (d) transistor
  31. 31.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) potentiometer (d) fuse
  32. 32.🧩 Which component limits the current? (a) motor (b) potentiometer (c) LDR (d) resistor
  33. 33.True or false: a resistor glows using little power. (a) True (b) False
  34. 34.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  35. 35.What does an LED do? (a) makes things spin (b) beeps for an alarm (c) glows using little power (d) smooths a wobbly supply
  36. 36.True or false: an LDR senses how bright it is. (a) True (b) False
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.True or false: an LED beeps for an alarm. (a) True (b) False
  39. 39.What does a resistor do? (a) lets current go one way (b) blows if current is high (c) stores a little charge (d) has coloured bands
  40. 40.True or false: a buzzer makes a beeping sound. (a) True (b) False

Answer key

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

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