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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 285 · 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.True or false: a resistor senses how hot it is. (a) True (b) False
  2. 2.🧩 Which component lets current go one way? (a) fuse (b) motor (c) buzzer (d) diode
  3. 3.True or false: an LDR senses how bright it is. (a) False (b) True
  4. 4.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) boosts a small signal (d) blows if current is high
  5. 5.What does a thermistor do? (a) limits the current (b) beeps for an alarm (c) lets current go one way (d) senses how hot it is
  6. 6.🧩 Which component limits the current? (a) capacitor (b) motor (c) LED (d) resistor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  8. 8.True or false: a buzzer senses how hot it is. (a) True (b) False
  9. 9.What does a diode do? (a) glows using little power (b) beeps for an alarm (c) lets current go one way (d) has coloured bands
  10. 10.🧩 Which component senses how hot it is? (a) LED (b) fuse (c) resistor (d) thermistor
  11. 11.True or false: an LED beeps for an alarm. (a) False (b) True
  12. 12.True or false: a diode lets current go one way. (a) False (b) True
  13. 13.True or false: a motor makes things spin. (a) True (b) False
  14. 14.🧩 Which component makes things spin? (a) thermistor (b) motor (c) buzzer (d) transistor
  15. 15.What does a motor do? (a) boosts a small signal (b) limits the current (c) makes things spin (d) is a resistance knob
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  17. 17.What does a buzzer do? (a) limits the current (b) makes things spin (c) beeps for an alarm (d) has coloured bands
  18. 18.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) stores a little charge (d) beeps for an alarm
  19. 19.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  20. 20.True or false: a buzzer makes a beeping sound. (a) False (b) True
  21. 21.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) transistor (d) LDR
  22. 22.What does an LED do? (a) limits the current (b) beeps for an alarm (c) boosts a small signal (d) glows using little power
  23. 23.True or false: a capacitor is a resistance knob. (a) False (b) True
  24. 24.🧩 Which component boosts a small signal? (a) motor (b) buzzer (c) transistor (d) resistor
  25. 25.🧩 Which component has coloured bands? (a) thermistor (b) fuse (c) resistor (d) LDR
  26. 26.What does a capacitor do? (a) limits the current (b) stores a little charge (c) beeps for an alarm (d) makes things spin
  27. 27.True or false: an LED limits the current. (a) False (b) True
  28. 28.What does a transistor do? (a) limits the current (b) makes a beeping sound (c) senses how bright it is (d) boosts a small signal
  29. 29.True or false: a transistor makes a beeping sound. (a) True (b) False
  30. 30.True or false: a resistor limits the current. (a) False (b) True
  31. 31.🧩 Which component stores a little charge? (a) fuse (b) thermistor (c) resistor (d) capacitor
  32. 32.True or false: a capacitor glows using little power. (a) True (b) False
  33. 33.🧩 Which component turns a fan or wheels? (a) capacitor (b) thermistor (c) resistor (d) motor
  34. 34.True or false: a resistor stores a little charge. (a) False (b) True
  35. 35.True or false: a resistor has coloured bands. (a) False (b) True
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  38. 38.True or false: a motor limits the current. (a) False (b) True
  39. 39.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) smooths a wobbly supply (d) blows if current is high
  40. 40.🧩 Which component is a resistance knob? (a) resistor (b) transistor (c) motor (d) potentiometer

Answer key

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

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