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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 420 · 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 diode do? (a) blows if current is high (b) makes things spin (c) lets current go one way (d) limits the current
  2. 2.🧩 Which component glows using little power? (a) diode (b) motor (c) buzzer (d) LED
  3. 3.True or false: a diode lets current go one way. (a) True (b) False
  4. 4.What does an LDR do? (a) limits the current (b) senses how bright it is (c) makes things spin (d) senses how hot it is
  5. 5.🧩 Which component has coloured bands? (a) capacitor (b) fuse (c) transistor (d) resistor
  6. 6.🧩 Which component makes things spin? (a) LED (b) LDR (c) thermistor (d) motor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  8. 8.What does a motor do? (a) makes things spin (b) lets current go one way (c) smooths a wobbly supply (d) has coloured bands
  9. 9.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) makes a beeping sound (d) beeps for an alarm
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  11. 11.True or false: a motor makes things spin. (a) False (b) True
  12. 12.🧩 Which component turns a fan or wheels? (a) resistor (b) LDR (c) buzzer (d) motor
  13. 13.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  14. 14.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) is a resistance knob (d) limits the current
  15. 15.True or false: a resistor beeps for an alarm. (a) True (b) False
  16. 16.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) smooths a wobbly supply (d) has coloured bands
  17. 17.🧩 Which component stores a little charge? (a) diode (b) motor (c) capacitor (d) fuse
  18. 18.True or false: a resistor blows if current is high. (a) False (b) True
  19. 19.True or false: a potentiometer is a resistance knob. (a) True (b) False
  20. 20.What does a potentiometer do? (a) glows using little power (b) is a resistance knob (c) limits the current (d) turns a fan or wheels
  21. 21.What does a thermistor do? (a) senses how bright it is (b) makes a beeping sound (c) senses how hot it is (d) is a resistance knob
  22. 22.True or false: an LDR stores a little charge. (a) False (b) True
  23. 23.🧩 Which component limits the current? (a) transistor (b) resistor (c) LDR (d) LED
  24. 24.True or false: a thermistor senses how hot it is. (a) True (b) False
  25. 25.True or false: an LDR senses how bright it is. (a) True (b) False
  26. 26.What does a transistor do? (a) beeps for an alarm (b) stores a little charge (c) boosts a small signal (d) makes things spin
  27. 27.True or false: a capacitor blows if current is high. (a) True (b) False
  28. 28.True or false: a motor blows if current is high. (a) True (b) False
  29. 29.True or false: a potentiometer stores a little charge. (a) False (b) True
  30. 30.True or false: a transistor boosts a small signal. (a) False (b) True
  31. 31.🧩 Which component smooths a wobbly supply? (a) resistor (b) transistor (c) LED (d) capacitor
  32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
  33. 33.True or false: a buzzer makes things spin. (a) True (b) False
  34. 34.True or false: a transistor limits the current. (a) True (b) False
  35. 35.True or false: a potentiometer boosts a small signal. (a) True (b) False
  36. 36.True or false: a thermistor has coloured bands. (a) True (b) False
  37. 37.True or false: an LED glows using little power. (a) True (b) False
  38. 38.True or false: a diode makes things spin. (a) False (b) True
  39. 39.🧩 Which component lets current go one way? (a) diode (b) motor (c) LDR (d) potentiometer
  40. 40.True or false: a thermistor limits the current. (a) True (b) False

Answer key

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

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