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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 54 · 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 boosts a small signal? (a) thermistor (b) transistor (c) LDR (d) potentiometer
  2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  3. 3.🧩 Which component makes things spin? (a) LDR (b) capacitor (c) thermistor (d) motor
  4. 4.What does a thermistor do? (a) senses how bright it is (b) is a resistance knob (c) turns a fan or wheels (d) senses how hot it is
  5. 5.What does a potentiometer do? (a) is a resistance knob (b) glows using little power (c) has coloured bands (d) boosts a small signal
  6. 6.What does a buzzer do? (a) blows if current is high (b) has coloured bands (c) beeps for an alarm (d) boosts a small signal
  7. 7.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  8. 8.True or false: a diode lets current go one way. (a) False (b) True
  9. 9.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) resistor (d) motor
  10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  11. 11.True or false: an LDR senses how bright it is. (a) True (b) False
  12. 12.True or false: a potentiometer is a resistance knob. (a) False (b) True
  13. 13.What does an LED do? (a) turns a fan or wheels (b) limits the current (c) glows using little power (d) is a resistance knob
  14. 14.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) is a resistance knob (d) senses how bright it is
  15. 15.True or false: a potentiometer senses how hot it is. (a) True (b) False
  16. 16.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) potentiometer (d) LDR
  17. 17.True or false: a buzzer limits the current. (a) False (b) True
  18. 18.🧩 Which component senses how hot it is? (a) fuse (b) transistor (c) thermistor (d) resistor
  19. 19.🧩 Which component makes a beeping sound? (a) motor (b) transistor (c) LDR (d) buzzer
  20. 20.What does a diode do? (a) limits the current (b) has coloured bands (c) glows using little power (d) lets current go one way
  21. 21.True or false: a transistor has coloured bands. (a) True (b) False
  22. 22.🧩 Which component glows using little power? (a) capacitor (b) diode (c) thermistor (d) LED
  23. 23.True or false: a potentiometer limits the current. (a) True (b) False
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  25. 25.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) thermistor (d) motor
  26. 26.🧩 Which component limits the current? (a) resistor (b) transistor (c) LDR (d) LED
  27. 27.What does a resistor do? (a) has coloured bands (b) boosts a small signal (c) is a resistance knob (d) makes a beeping sound
  28. 28.True or false: an LED glows using little power. (a) True (b) False
  29. 29.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) transistor (d) LDR
  30. 30.True or false: a potentiometer senses how bright it is. (a) True (b) False
  31. 31.True or false: a diode makes things spin. (a) False (b) True
  32. 32.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) smooths a wobbly supply (d) boosts a small signal
  33. 33.What does a resistor do? (a) is a resistance knob (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal
  34. 34.True or false: a potentiometer makes things spin. (a) False (b) True
  35. 35.What does an LDR do? (a) blows if current is high (b) makes a beeping sound (c) has coloured bands (d) senses how bright it is
  36. 36.True or false: a transistor boosts a small signal. (a) True (b) False
  37. 37.True or false: a capacitor stores a little charge. (a) False (b) True
  38. 38.True or false: a motor is a resistance knob. (a) False (b) True
  39. 39.🧩 Which component lets current go one way? (a) LDR (b) thermistor (c) potentiometer (d) diode
  40. 40.What does a motor do? (a) makes things spin (b) senses how hot it is (c) smooths a wobbly supply (d) is a resistance knob

Answer key

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

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