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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 483 · 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 an LDR do? (a) boosts a small signal (b) stores a little charge (c) senses how bright it is (d) limits the current
  2. 2.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) fuse (d) diode
  3. 3.🧩 Which component makes a beeping sound? (a) fuse (b) resistor (c) thermistor (d) buzzer
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  5. 5.True or false: a capacitor stores a little charge. (a) False (b) True
  6. 6.What does an LED do? (a) limits the current (b) glows using little power (c) stores a little charge (d) boosts a small signal
  7. 7.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) fuse (d) LDR
  8. 8.What does a potentiometer do? (a) smooths a wobbly supply (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  9. 9.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) fuse (d) thermistor
  10. 10.What does a capacitor do? (a) has coloured bands (b) limits the current (c) makes a beeping sound (d) stores a little charge
  11. 11.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  12. 12.What does a buzzer do? (a) blows if current is high (b) makes things spin (c) makes a beeping sound (d) senses how bright it is
  13. 13.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  14. 14.🧩 Which component lets current go one way? (a) buzzer (b) motor (c) capacitor (d) diode
  15. 15.True or false: a fuse makes things spin. (a) True (b) False
  16. 16.True or false: a capacitor senses how bright it is. (a) False (b) True
  17. 17.🧩 Which component makes things spin? (a) potentiometer (b) fuse (c) motor (d) resistor
  18. 18.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) capacitor (d) resistor
  19. 19.🧩 Which component senses how hot it is? (a) diode (b) capacitor (c) LDR (d) thermistor
  20. 20.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) lets current go one way (d) stores a little charge
  21. 21.What does a resistor do? (a) is a resistance knob (b) lets current go one way (c) makes a beeping sound (d) has coloured bands
  22. 22.True or false: a motor limits the current. (a) True (b) False
  23. 23.What does a motor do? (a) glows using little power (b) senses how hot it is (c) smooths a wobbly supply (d) turns a fan or wheels
  24. 24.True or false: an LED is a resistance knob. (a) False (b) True
  25. 25.What does a resistor do? (a) makes things spin (b) boosts a small signal (c) beeps for an alarm (d) limits the current
  26. 26.True or false: a motor has coloured bands. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) diode (b) potentiometer (c) capacitor (d) buzzer
  28. 28.True or false: a thermistor senses how hot it is. (a) False (b) True
  29. 29.True or false: a buzzer stores a little charge. (a) False (b) True
  30. 30.True or false: an LED senses how bright it is. (a) False (b) True
  31. 31.🧩 Which component limits the current? (a) LDR (b) transistor (c) capacitor (d) resistor
  32. 32.🧩 Which component beeps for an alarm? (a) diode (b) LED (c) LDR (d) buzzer
  33. 33.True or false: a potentiometer is a resistance knob. (a) True (b) False
  34. 34.True or false: an LED has coloured bands. (a) False (b) True
  35. 35.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) LED (d) buzzer
  36. 36.🧩 Which component glows using little power? (a) diode (b) motor (c) buzzer (d) LED
  37. 37.True or false: a motor boosts a small signal. (a) True (b) False
  38. 38.True or false: a transistor senses how bright it is. (a) False (b) True
  39. 39.🧩 Which component blows if current is high? (a) diode (b) fuse (c) LDR (d) capacitor
  40. 40.What does a diode do? (a) limits the current (b) makes a beeping sound (c) lets current go one way (d) makes things spin

Answer key

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

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