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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 200 · 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 resistor do? (a) beeps for an alarm (b) glows using little power (c) blows if current is high (d) has coloured bands
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  4. 4.True or false: a resistor senses how hot it is. (a) False (b) True
  5. 5.True or false: a buzzer beeps for an alarm. (a) False (b) True
  6. 6.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) resistor (d) buzzer
  7. 7.True or false: a resistor has coloured bands. (a) False (b) True
  8. 8.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) capacitor (d) resistor
  9. 9.True or false: an LED glows using little power. (a) False (b) True
  10. 10.What does a thermistor do? (a) glows using little power (b) makes things spin (c) blows if current is high (d) senses how hot it is
  11. 11.True or false: a thermistor is a resistance knob. (a) True (b) False
  12. 12.🧩 Which component has coloured bands? (a) diode (b) thermistor (c) buzzer (d) resistor
  13. 13.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  14. 14.🧩 Which component turns a fan or wheels? (a) resistor (b) transistor (c) motor (d) capacitor
  15. 15.What does an LED do? (a) senses how bright it is (b) blows if current is high (c) limits the current (d) glows using little power
  16. 16.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) smooths a wobbly supply (d) lets current go one way
  17. 17.🧩 Which component blows if current is high? (a) transistor (b) resistor (c) fuse (d) capacitor
  18. 18.What does a motor do? (a) senses how hot it is (b) lets current go one way (c) stores a little charge (d) makes things spin
  19. 19.🧩 Which component senses how bright it is? (a) resistor (b) diode (c) LDR (d) LED
  20. 20.🧩 Which component makes things spin? (a) diode (b) motor (c) thermistor (d) capacitor
  21. 21.🧩 Which component stores a little charge? (a) thermistor (b) motor (c) capacitor (d) LDR
  22. 22.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) limits the current (d) stores a little charge
  23. 23.True or false: a transistor blows if current is high. (a) False (b) True
  24. 24.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) potentiometer (d) buzzer
  25. 25.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) buzzer (d) thermistor
  26. 26.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  27. 27.🧩 Which component glows using little power? (a) LED (b) capacitor (c) LDR (d) transistor
  28. 28.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  29. 29.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) transistor (d) thermistor
  30. 30.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) smooths a wobbly supply
  31. 31.True or false: a diode limits the current. (a) False (b) True
  32. 32.🧩 Which component limits the current? (a) transistor (b) capacitor (c) resistor (d) LDR
  33. 33.True or false: a potentiometer is a resistance knob. (a) True (b) False
  34. 34.True or false: an LDR senses how hot it is. (a) True (b) False
  35. 35.True or false: a diode lets current go one way. (a) False (b) True
  36. 36.True or false: a resistor lets current go one way. (a) True (b) False
  37. 37.True or false: a thermistor beeps for an alarm. (a) True (b) False
  38. 38.True or false: a fuse blows if current is high. (a) True (b) False
  39. 39.What does a potentiometer do? (a) lets current go one way (b) beeps for an alarm (c) is a resistance knob (d) stores a little charge
  40. 40.True or false: a motor smooths a wobbly supply. (a) True (b) False

Answer key

  1. has coloured bands
  2. a buzzer
  3. store charge briefly
  4. False
  5. True
  6. diode
  7. True
  8. buzzer
  9. True
  10. senses how hot it is
  11. False
  12. resistor
  13. a motor
  14. motor
  15. glows using little power
  16. senses how bright it is
  17. fuse
  18. makes things spin
  19. LDR
  20. motor
  21. capacitor
  22. turns a fan or wheels
  23. False
  24. thermistor
  25. potentiometer
  26. True
  27. LED
  28. False
  29. buzzer
  30. makes a beeping sound
  31. False
  32. resistor
  33. True
  34. False
  35. True
  36. False
  37. False
  38. True
  39. is a resistance knob
  40. False

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