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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 581 · 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 part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  2. 2.🧩 Which component blows if current is high? (a) diode (b) fuse (c) capacitor (d) LED
  3. 3.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) has coloured bands (d) glows using little power
  4. 4.True or false: a motor turns a fan or wheels. (a) False (b) True
  5. 5.🧩 Which component lets current go one way? (a) resistor (b) diode (c) transistor (d) buzzer
  6. 6.What does a diode do? (a) senses how hot it is (b) limits the current (c) lets current go one way (d) blows if current is high
  7. 7.True or false: a potentiometer lets current go one way. (a) False (b) True
  8. 8.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) diode (d) fuse
  9. 9.True or false: a thermistor blows if current is high. (a) False (b) True
  10. 10.🧩 Which component senses how bright it is? (a) motor (b) transistor (c) LDR (d) buzzer
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  12. 12.What does a motor do? (a) smooths a wobbly supply (b) limits the current (c) has coloured bands (d) makes things spin
  13. 13.True or false: a motor lets current go one way. (a) True (b) False
  14. 14.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) makes a beeping sound (d) boosts a small signal
  15. 15.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) diode (d) resistor
  16. 16.True or false: a potentiometer is a resistance knob. (a) True (b) False
  17. 17.True or false: an LED makes a beeping sound. (a) False (b) True
  18. 18.🧩 Which component limits the current? (a) transistor (b) motor (c) diode (d) resistor
  19. 19.🧩 Which component glows using little power? (a) resistor (b) transistor (c) diode (d) LED
  20. 20.True or false: a transistor lets current go one way. (a) False (b) True
  21. 21.🧩 Which component makes things spin? (a) transistor (b) motor (c) capacitor (d) LED
  22. 22.🧩 Which component beeps for an alarm? (a) transistor (b) motor (c) LDR (d) buzzer
  23. 23.What does a thermistor do? (a) limits the current (b) beeps for an alarm (c) senses how hot it is (d) senses how bright it is
  24. 24.What does a potentiometer do? (a) is a resistance knob (b) beeps for an alarm (c) limits the current (d) blows if current is high
  25. 25.What does an LED do? (a) senses how bright it is (b) has coloured bands (c) glows using little power (d) smooths a wobbly supply
  26. 26.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  27. 27.True or false: a transistor senses how bright it is. (a) True (b) False
  28. 28.True or false: a transistor boosts a small signal. (a) False (b) True
  29. 29.True or false: an LDR senses how bright it is. (a) True (b) False
  30. 30.What does a buzzer do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) beeps for an alarm
  31. 31.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) transistor (d) resistor
  32. 32.True or false: a buzzer lets current go one way. (a) False (b) True
  33. 33.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  34. 34.True or false: a capacitor beeps for an alarm. (a) True (b) False
  35. 35.What does a fuse do? (a) makes things spin (b) smooths a wobbly supply (c) blows if current is high (d) limits the current
  36. 36.True or false: a motor makes things spin. (a) False (b) True
  37. 37.🧩 Which component boosts a small signal? (a) capacitor (b) thermistor (c) diode (d) transistor
  38. 38.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) buzzer (d) capacitor
  39. 39.🧩 Which component stores a little charge? (a) fuse (b) thermistor (c) capacitor (d) transistor
  40. 40.True or false: a resistor limits the current. (a) True (b) False

Answer key

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

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