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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 410 · 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) senses how hot it is (b) stores a little charge (c) blows if current is high (d) boosts a small signal
  2. 2.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) limits the current (d) boosts a small signal
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  4. 4.🧩 Which component boosts a small signal? (a) buzzer (b) LED (c) potentiometer (d) transistor
  5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  6. 6.What does a motor do? (a) makes a beeping sound (b) is a resistance knob (c) beeps for an alarm (d) makes things spin
  7. 7.True or false: a capacitor stores a little charge. (a) True (b) False
  8. 8.🧩 Which component makes things spin? (a) motor (b) diode (c) transistor (d) capacitor
  9. 9.True or false: a transistor boosts a small signal. (a) True (b) False
  10. 10.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  11. 11.🧩 Which component has coloured bands? (a) buzzer (b) potentiometer (c) resistor (d) capacitor
  12. 12.True or false: a diode smooths a wobbly supply. (a) True (b) False
  13. 13.🧩 Which component blows if current is high? (a) potentiometer (b) LED (c) fuse (d) motor
  14. 14.🧩 Which component glows using little power? (a) buzzer (b) diode (c) LED (d) LDR
  15. 15.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) buzzer (d) diode
  16. 16.What does a buzzer do? (a) turns a fan or wheels (b) is a resistance knob (c) senses how bright it is (d) makes a beeping sound
  17. 17.True or false: a resistor beeps for an alarm. (a) False (b) True
  18. 18.What does a resistor do? (a) limits the current (b) boosts a small signal (c) makes a beeping sound (d) beeps for an alarm
  19. 19.True or false: a thermistor senses how hot it is. (a) False (b) True
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) beeps for an alarm (d) is a resistance knob
  22. 22.What does a resistor do? (a) boosts a small signal (b) beeps for an alarm (c) has coloured bands (d) makes a beeping sound
  23. 23.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) beeps for an alarm (d) blows if current is high
  24. 24.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) has coloured bands (d) lets current go one way
  25. 25.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
  26. 26.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) LED (d) diode
  27. 27.🧩 Which component limits the current? (a) capacitor (b) diode (c) motor (d) resistor
  28. 28.True or false: an LED glows using little power. (a) True (b) False
  29. 29.🧩 Which component lets current go one way? (a) motor (b) potentiometer (c) diode (d) capacitor
  30. 30.True or false: a resistor lets current go one way. (a) False (b) True
  31. 31.True or false: an LDR beeps for an alarm. (a) True (b) False
  32. 32.🧩 Which component turns a fan or wheels? (a) capacitor (b) buzzer (c) motor (d) LDR
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  34. 34.What does a potentiometer do? (a) boosts a small signal (b) senses how hot it is (c) blows if current is high (d) is a resistance knob
  35. 35.What does a transistor do? (a) limits the current (b) makes a beeping sound (c) boosts a small signal (d) has coloured bands
  36. 36.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
  37. 37.True or false: a buzzer beeps for an alarm. (a) True (b) False
  38. 38.True or false: an LED has coloured bands. (a) True (b) False
  39. 39.True or false: a diode lets current go one way. (a) True (b) False
  40. 40.What does a buzzer do? (a) blows if current is high (b) lets current go one way (c) beeps for an alarm (d) smooths a wobbly supply

Answer key

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

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