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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 162 · 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 part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  2. 2.True or false: an LED makes things spin. (a) False (b) True
  3. 3.🧩 Which component has coloured bands? (a) fuse (b) motor (c) resistor (d) capacitor
  4. 4.What does a capacitor do? (a) is a resistance knob (b) limits the current (c) smooths a wobbly supply (d) makes a beeping sound
  5. 5.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  6. 6.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) blows if current is high (d) senses how bright it is
  7. 7.What does a motor do? (a) makes a beeping sound (b) is a resistance knob (c) turns a fan or wheels (d) stores a little charge
  8. 8.True or false: a capacitor stores a little charge. (a) False (b) True
  9. 9.What does a transistor do? (a) turns a fan or wheels (b) lets current go one way (c) boosts a small signal (d) senses how bright it is
  10. 10.True or false: a motor turns a fan or wheels. (a) False (b) True
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  13. 13.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) makes a beeping sound (d) lets current go one way
  14. 14.🧩 Which component senses how hot it is? (a) resistor (b) LED (c) potentiometer (d) thermistor
  15. 15.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  16. 16.True or false: a resistor beeps for an alarm. (a) False (b) True
  17. 17.True or false: a motor senses how hot it is. (a) False (b) True
  18. 18.🧩 Which component limits the current? (a) buzzer (b) resistor (c) fuse (d) LED
  19. 19.True or false: a resistor limits the current. (a) True (b) False
  20. 20.🧩 Which component blows if current is high? (a) potentiometer (b) motor (c) fuse (d) capacitor
  21. 21.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LED (c) capacitor (d) transistor
  22. 22.🧩 Which component glows using little power? (a) potentiometer (b) buzzer (c) LED (d) LDR
  23. 23.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
  24. 24.True or false: a thermistor limits the current. (a) True (b) False
  25. 25.🧩 Which component is a resistance knob? (a) resistor (b) LDR (c) potentiometer (d) diode
  26. 26.True or false: a buzzer blows if current is high. (a) False (b) True
  27. 27.🧩 Which component turns a fan or wheels? (a) LED (b) thermistor (c) motor (d) transistor
  28. 28.True or false: a resistor has coloured bands. (a) False (b) True
  29. 29.True or false: a motor makes things spin. (a) False (b) True
  30. 30.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) boosts a small signal (d) smooths a wobbly supply
  31. 31.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) fuse (d) motor
  32. 32.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  33. 33.True or false: a diode beeps for an alarm. (a) False (b) True
  34. 34.True or false: a resistor blows if current is high. (a) False (b) True
  35. 35.True or false: a fuse blows if current is high. (a) True (b) False
  36. 36.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) LED (d) motor
  37. 37.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  38. 38.True or false: a potentiometer is a resistance knob. (a) False (b) True
  39. 39.🧩 Which component makes things spin? (a) transistor (b) thermistor (c) motor (d) LED
  40. 40.🧩 Which component boosts a small signal? (a) fuse (b) transistor (c) motor (d) thermistor

Answer key

  1. a buzzer
  2. False
  3. resistor
  4. smooths a wobbly supply
  5. False
  6. has coloured bands
  7. turns a fan or wheels
  8. True
  9. boosts a small signal
  10. True
  11. store charge briefly
  12. a motor
  13. senses how hot it is
  14. thermistor
  15. False
  16. False
  17. False
  18. resistor
  19. True
  20. fuse
  21. capacitor
  22. LED
  23. beeps for an alarm
  24. False
  25. potentiometer
  26. False
  27. motor
  28. True
  29. True
  30. is a resistance knob
  31. diode
  32. False
  33. False
  34. False
  35. True
  36. LDR
  37. False
  38. True
  39. motor
  40. transistor

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