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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 110 · 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.What does a capacitor do? (a) limits the current (b) turns a fan or wheels (c) stores a little charge (d) makes a beeping sound
  2. 2.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) diode (d) potentiometer
  3. 3.True or false: a capacitor has coloured bands. (a) True (b) False
  4. 4.True or false: a diode has coloured bands. (a) True (b) False
  5. 5.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) turns a fan or wheels (d) senses how bright it is
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  7. 7.True or false: a potentiometer is a resistance knob. (a) False (b) True
  8. 8.What does an LED do? (a) limits the current (b) beeps for an alarm (c) senses how bright it is (d) glows using little power
  9. 9.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) transistor (d) LED
  10. 10.True or false: a buzzer makes a beeping sound. (a) True (b) False
  11. 11.🧩 Which component has coloured bands? (a) LED (b) motor (c) buzzer (d) resistor
  12. 12.🧩 Which component smooths a wobbly supply? (a) LDR (b) fuse (c) potentiometer (d) capacitor
  13. 13.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  14. 14.What does a potentiometer do? (a) makes a beeping sound (b) senses how bright it is (c) is a resistance knob (d) smooths a wobbly supply
  15. 15.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  16. 16.True or false: a resistor is a resistance knob. (a) True (b) False
  17. 17.True or false: a motor makes a beeping sound. (a) True (b) False
  18. 18.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  19. 19.What does a motor do? (a) boosts a small signal (b) lets current go one way (c) beeps for an alarm (d) makes things spin
  20. 20.True or false: a capacitor stores a little charge. (a) True (b) False
  21. 21.🧩 Which component turns a fan or wheels? (a) fuse (b) thermistor (c) motor (d) LED
  22. 22.What does a buzzer do? (a) makes things spin (b) boosts a small signal (c) limits the current (d) makes a beeping sound
  23. 23.🧩 Which component limits the current? (a) LDR (b) resistor (c) potentiometer (d) transistor
  24. 24.What does a capacitor do? (a) beeps for an alarm (b) lets current go one way (c) smooths a wobbly supply (d) makes things spin
  25. 25.What does a thermistor do? (a) stores a little charge (b) boosts a small signal (c) senses how hot it is (d) makes a beeping sound
  26. 26.True or false: a buzzer blows if current is high. (a) False (b) True
  27. 27.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) buzzer (d) transistor
  28. 28.True or false: a resistor limits the current. (a) True (b) False
  29. 29.True or false: a thermistor blows if current is high. (a) True (b) False
  30. 30.True or false: a buzzer glows using little power. (a) True (b) False
  31. 31.What does a fuse do? (a) blows if current is high (b) boosts a small signal (c) lets current go one way (d) has coloured bands
  32. 32.🧩 Which component stores a little charge? (a) fuse (b) resistor (c) LDR (d) capacitor
  33. 33.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  34. 34.🧩 Which component senses how hot it is? (a) buzzer (b) transistor (c) thermistor (d) motor
  35. 35.True or false: an LDR makes a beeping sound. (a) False (b) True
  36. 36.🧩 Which component blows if current is high? (a) thermistor (b) buzzer (c) fuse (d) potentiometer
  37. 37.🧩 Which component boosts a small signal? (a) motor (b) LDR (c) transistor (d) resistor
  38. 38.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) resistor (d) transistor
  39. 39.🧩 Which component is a resistance knob? (a) motor (b) potentiometer (c) resistor (d) fuse
  40. 40.What does an LDR do? (a) blows if current is high (b) lets current go one way (c) senses how bright it is (d) has coloured bands

Answer key

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

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