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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 212 · 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 buzzer do? (a) makes a beeping sound (b) makes things spin (c) smooths a wobbly supply (d) glows using little power
  2. 2.True or false: an LED turns a fan or wheels. (a) True (b) False
  3. 3.What does an LDR do? (a) boosts a small signal (b) makes things spin (c) glows using little power (d) senses how bright it is
  4. 4.What does a capacitor do? (a) makes a beeping sound (b) blows if current is high (c) lets current go one way (d) smooths a wobbly supply
  5. 5.🧩 Which component boosts a small signal? (a) diode (b) resistor (c) transistor (d) thermistor
  6. 6.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) makes a beeping sound (d) glows using little power
  7. 7.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) diode (d) LED
  8. 8.True or false: a potentiometer is a resistance knob. (a) False (b) True
  9. 9.🧩 Which component stores a little charge? (a) transistor (b) motor (c) capacitor (d) LED
  10. 10.🧩 Which component makes a beeping sound? (a) motor (b) LDR (c) buzzer (d) transistor
  11. 11.🧩 Which component is a resistance knob? (a) transistor (b) capacitor (c) potentiometer (d) resistor
  12. 12.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  13. 13.True or false: a transistor turns a fan or wheels. (a) False (b) True
  14. 14.What does a potentiometer do? (a) makes a beeping sound (b) stores a little charge (c) is a resistance knob (d) lets current go one way
  15. 15.🧩 Which component limits the current? (a) LED (b) fuse (c) resistor (d) LDR
  16. 16.🧩 Which component lets current go one way? (a) LED (b) thermistor (c) diode (d) fuse
  17. 17.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.What does a transistor do? (a) makes things spin (b) beeps for an alarm (c) boosts a small signal (d) makes a beeping sound
  21. 21.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) diode (d) motor
  22. 22.True or false: a resistor glows using little power. (a) True (b) False
  23. 23.True or false: a buzzer boosts a small signal. (a) False (b) True
  24. 24.🧩 Which component makes things spin? (a) diode (b) capacitor (c) LDR (d) motor
  25. 25.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  26. 26.True or false: a diode is a resistance knob. (a) True (b) False
  27. 27.What does an LED do? (a) limits the current (b) glows using little power (c) senses how bright it is (d) boosts a small signal
  28. 28.True or false: a motor beeps for an alarm. (a) False (b) True
  29. 29.🧩 Which component blows if current is high? (a) motor (b) fuse (c) capacitor (d) buzzer
  30. 30.True or false: a capacitor makes things spin. (a) False (b) True
  31. 31.True or false: a transistor is a resistance knob. (a) True (b) False
  32. 32.True or false: a transistor limits the current. (a) False (b) True
  33. 33.🧩 Which component has coloured bands? (a) LDR (b) buzzer (c) diode (d) resistor
  34. 34.🧩 Which component turns a fan or wheels? (a) capacitor (b) LED (c) LDR (d) motor
  35. 35.What does a resistor do? (a) limits the current (b) glows using little power (c) turns a fan or wheels (d) makes a beeping sound
  36. 36.What does a resistor do? (a) has coloured bands (b) boosts a small signal (c) senses how hot it is (d) senses how bright it is
  37. 37.True or false: a capacitor makes a beeping sound. (a) False (b) True
  38. 38.True or false: a fuse senses how bright it is. (a) True (b) False
  39. 39.True or false: a resistor limits the current. (a) True (b) False
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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