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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 611 · 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 buzzer makes a beeping sound. (a) False (b) True
  2. 2.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) diode (d) transistor
  3. 3.True or false: a resistor has coloured bands. (a) True (b) False
  4. 4.🧩 Which component boosts a small signal? (a) fuse (b) thermistor (c) transistor (d) LDR
  5. 5.True or false: an LDR is a resistance knob. (a) False (b) True
  6. 6.True or false: an LED senses how hot it is. (a) False (b) True
  7. 7.What does an LDR do? (a) boosts a small signal (b) limits the current (c) senses how bright it is (d) smooths a wobbly supply
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  9. 9.What does a diode do? (a) makes a beeping sound (b) beeps for an alarm (c) makes things spin (d) lets current go one way
  10. 10.True or false: an LED stores a little charge. (a) False (b) True
  11. 11.What does a resistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) has coloured bands (d) stores a little charge
  12. 12.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  13. 13.What does a buzzer do? (a) glows using little power (b) limits the current (c) has coloured bands (d) makes a beeping sound
  14. 14.What does a thermistor do? (a) makes things spin (b) turns a fan or wheels (c) senses how hot it is (d) senses how bright it is
  15. 15.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  16. 16.🧩 Which component makes a beeping sound? (a) motor (b) LDR (c) resistor (d) buzzer
  17. 17.True or false: a diode lets current go one way. (a) False (b) True
  18. 18.True or false: a fuse lets current go one way. (a) True (b) False
  19. 19.What does a buzzer do? (a) is a resistance knob (b) senses how hot it is (c) senses how bright it is (d) beeps for an alarm
  20. 20.True or false: a fuse blows if current is high. (a) True (b) False
  21. 21.🧩 Which component limits the current? (a) fuse (b) resistor (c) buzzer (d) LED
  22. 22.True or false: a transistor turns a fan or wheels. (a) True (b) False
  23. 23.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) diode (d) motor
  24. 24.True or false: a buzzer is a resistance knob. (a) False (b) True
  25. 25.True or false: a resistor limits the current. (a) True (b) False
  26. 26.True or false: a resistor beeps for an alarm. (a) True (b) False
  27. 27.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) makes a beeping sound (d) lets current go one way
  28. 28.What does a potentiometer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) stores a little charge (d) is a resistance knob
  29. 29.🧩 Which component blows if current is high? (a) potentiometer (b) thermistor (c) fuse (d) motor
  30. 30.True or false: an LED is a resistance knob. (a) True (b) False
  31. 31.True or false: a resistor senses how bright it is. (a) True (b) False
  32. 32.🧩 Which component has coloured bands? (a) LDR (b) potentiometer (c) resistor (d) fuse
  33. 33.🧩 Which component senses how bright it is? (a) resistor (b) potentiometer (c) LDR (d) diode
  34. 34.True or false: a motor turns a fan or wheels. (a) False (b) True
  35. 35.🧩 Which component makes things spin? (a) resistor (b) LDR (c) motor (d) thermistor
  36. 36.True or false: a potentiometer is a resistance knob. (a) False (b) True
  37. 37.What does a motor do? (a) makes things spin (b) senses how bright it is (c) limits the current (d) smooths a wobbly supply
  38. 38.True or false: a motor lets current go one way. (a) True (b) False
  39. 39.🧩 Which component lets current go one way? (a) LDR (b) diode (c) motor (d) LED
  40. 40.True or false: a fuse senses how bright it is. (a) True (b) False

Answer key

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

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