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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 585 · 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 smooths a wobbly supply? (a) resistor (b) motor (c) capacitor (d) buzzer
  2. 2.True or false: a capacitor blows if current is high. (a) False (b) True
  3. 3.What does a thermistor do? (a) limits the current (b) is a resistance knob (c) senses how hot it is (d) makes things spin
  4. 4.What does a fuse do? (a) glows using little power (b) stores a little charge (c) blows if current is high (d) turns a fan or wheels
  5. 5.🧩 Which component blows if current is high? (a) resistor (b) buzzer (c) fuse (d) transistor
  6. 6.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  7. 7.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) senses how hot it is (d) glows using little power
  8. 8.🧩 Which component limits the current? (a) diode (b) motor (c) resistor (d) buzzer
  9. 9.True or false: a diode lets current go one way. (a) True (b) False
  10. 10.What does a transistor do? (a) senses how bright it is (b) blows if current is high (c) limits the current (d) boosts a small signal
  11. 11.🧩 Which component turns a fan or wheels? (a) transistor (b) motor (c) LDR (d) diode
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  13. 13.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) fuse (d) buzzer
  14. 14.What does a diode do? (a) turns a fan or wheels (b) is a resistance knob (c) lets current go one way (d) beeps for an alarm
  15. 15.True or false: a fuse has coloured bands. (a) False (b) True
  16. 16.What does an LED do? (a) lets current go one way (b) glows using little power (c) has coloured bands (d) blows if current is high
  17. 17.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  18. 18.🧩 Which component senses how hot it is? (a) fuse (b) capacitor (c) diode (d) thermistor
  19. 19.🧩 Which component glows using little power? (a) buzzer (b) capacitor (c) thermistor (d) LED
  20. 20.True or false: an LDR senses how bright it is. (a) True (b) False
  21. 21.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) LDR (d) capacitor
  22. 22.True or false: a motor makes things spin. (a) False (b) True
  23. 23.True or false: a motor turns a fan or wheels. (a) True (b) False
  24. 24.🧩 Which component has coloured bands? (a) capacitor (b) buzzer (c) motor (d) resistor
  25. 25.True or false: a thermistor lets current go one way. (a) False (b) True
  26. 26.🧩 Which component boosts a small signal? (a) LDR (b) potentiometer (c) transistor (d) fuse
  27. 27.What does a potentiometer do? (a) glows using little power (b) is a resistance knob (c) stores a little charge (d) lets current go one way
  28. 28.🧩 Which component makes things spin? (a) LDR (b) potentiometer (c) thermistor (d) motor
  29. 29.True or false: a thermistor boosts a small signal. (a) True (b) False
  30. 30.True or false: an LED makes a beeping sound. (a) True (b) False
  31. 31.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) buzzer (d) transistor
  32. 32.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) diode (d) capacitor
  33. 33.True or false: a capacitor senses how bright it is. (a) False (b) True
  34. 34.What does a capacitor do? (a) has coloured bands (b) blows if current is high (c) stores a little charge (d) makes things spin
  35. 35.What does a resistor do? (a) limits the current (b) senses how hot it is (c) senses how bright it is (d) makes things spin
  36. 36.True or false: a diode stores a little charge. (a) True (b) False
  37. 37.True or false: a capacitor glows using little power. (a) True (b) False
  38. 38.True or false: a resistor beeps for an alarm. (a) True (b) False
  39. 39.True or false: a thermistor makes a beeping sound. (a) False (b) True
  40. 40.True or false: a thermistor senses how hot it is. (a) False (b) True

Answer key

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

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