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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 426 · 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 lets current go one way? (a) diode (b) potentiometer (c) fuse (d) buzzer
  2. 2.What does a fuse do? (a) blows if current is high (b) limits the current (c) is a resistance knob (d) boosts a small signal
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  4. 4.What does a potentiometer do? (a) limits the current (b) beeps for an alarm (c) makes things spin (d) is a resistance knob
  5. 5.True or false: a diode smooths a wobbly supply. (a) True (b) False
  6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  7. 7.True or false: an LDR beeps for an alarm. (a) True (b) False
  8. 8.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) thermistor (d) motor
  9. 9.🧩 Which component turns a fan or wheels? (a) buzzer (b) capacitor (c) motor (d) resistor
  10. 10.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) capacitor (d) resistor
  11. 11.🧩 Which component senses how hot it is? (a) capacitor (b) resistor (c) diode (d) thermistor
  12. 12.True or false: an LDR senses how bright it is. (a) False (b) True
  13. 13.What does an LED do? (a) beeps for an alarm (b) stores a little charge (c) glows using little power (d) has coloured bands
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  15. 15.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) limits the current (d) boosts a small signal
  16. 16.True or false: a resistor limits the current. (a) True (b) False
  17. 17.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) smooths a wobbly supply (d) senses how hot it is
  18. 18.True or false: an LED smooths a wobbly supply. (a) False (b) True
  19. 19.True or false: a thermistor boosts a small signal. (a) False (b) True
  20. 20.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  21. 21.🧩 Which component glows using little power? (a) buzzer (b) resistor (c) transistor (d) LED
  22. 22.True or false: a motor turns a fan or wheels. (a) True (b) False
  23. 23.🧩 Which component beeps for an alarm? (a) LED (b) transistor (c) buzzer (d) resistor
  24. 24.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) motor (d) resistor
  25. 25.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) fuse (d) diode
  26. 26.True or false: an LED beeps for an alarm. (a) True (b) False
  27. 27.True or false: a potentiometer senses how hot it is. (a) False (b) True
  28. 28.True or false: a diode beeps for an alarm. (a) False (b) True
  29. 29.What does a diode do? (a) makes a beeping sound (b) turns a fan or wheels (c) blows if current is high (d) lets current go one way
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component is a resistance knob? (a) LED (b) transistor (c) potentiometer (d) diode
  32. 32.True or false: a capacitor stores a little charge. (a) True (b) False
  33. 33.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) capacitor (d) LED
  34. 34.🧩 Which component smooths a wobbly supply? (a) motor (b) thermistor (c) resistor (d) capacitor
  35. 35.🧩 Which component blows if current is high? (a) diode (b) fuse (c) LDR (d) resistor
  36. 36.True or false: a diode lets current go one way. (a) True (b) False
  37. 37.True or false: an LED makes a beeping sound. (a) True (b) False
  38. 38.What does an LDR do? (a) glows using little power (b) has coloured bands (c) lets current go one way (d) senses how bright it is
  39. 39.True or false: a buzzer makes things spin. (a) True (b) False
  40. 40.What does a capacitor do? (a) makes things spin (b) turns a fan or wheels (c) makes a beeping sound (d) smooths a wobbly supply

Answer key

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

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