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Electronics Worksheet: Electronic Components

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

Answer key

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

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