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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 166 · 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 an LDR do? (a) boosts a small signal (b) senses how bright it is (c) turns a fan or wheels (d) limits the current
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  3. 3.What does a capacitor do? (a) limits the current (b) turns a fan or wheels (c) senses how hot it is (d) stores a little charge
  4. 4.🧩 Which component limits the current? (a) motor (b) diode (c) potentiometer (d) resistor
  5. 5.True or false: a resistor senses how bright it is. (a) True (b) False
  6. 6.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) makes a beeping sound
  7. 7.🧩 Which component glows using little power? (a) resistor (b) potentiometer (c) LED (d) transistor
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  9. 9.🧩 Which component senses how bright it is? (a) transistor (b) motor (c) thermistor (d) LDR
  10. 10.What does a transistor do? (a) has coloured bands (b) glows using little power (c) makes things spin (d) boosts a small signal
  11. 11.What does a fuse do? (a) limits the current (b) is a resistance knob (c) glows using little power (d) blows if current is high
  12. 12.🧩 Which component makes things spin? (a) resistor (b) transistor (c) fuse (d) motor
  13. 13.What does a resistor do? (a) beeps for an alarm (b) has coloured bands (c) senses how bright it is (d) boosts a small signal
  14. 14.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  15. 15.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) transistor (d) buzzer
  16. 16.What does a buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) senses how bright it is (d) smooths a wobbly supply
  17. 17.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  18. 18.True or false: a resistor limits the current. (a) True (b) False
  19. 19.True or false: a motor stores a little charge. (a) False (b) True
  20. 20.What does a motor do? (a) glows using little power (b) makes things spin (c) smooths a wobbly supply (d) is a resistance knob
  21. 21.What does a motor do? (a) has coloured bands (b) stores a little charge (c) is a resistance knob (d) turns a fan or wheels
  22. 22.True or false: a diode makes things spin. (a) False (b) True
  23. 23.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) transistor (d) buzzer
  24. 24.True or false: a capacitor boosts a small signal. (a) True (b) False
  25. 25.🧩 Which component has coloured bands? (a) capacitor (b) diode (c) thermistor (d) resistor
  26. 26.True or false: a motor blows if current is high. (a) False (b) True
  27. 27.True or false: a potentiometer is a resistance knob. (a) True (b) False
  28. 28.True or false: a resistor has coloured bands. (a) True (b) False
  29. 29.🧩 Which component stores a little charge? (a) LDR (b) buzzer (c) transistor (d) capacitor
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.🧩 Which component makes a beeping sound? (a) fuse (b) LDR (c) buzzer (d) resistor
  32. 32.True or false: a capacitor has coloured bands. (a) True (b) False
  33. 33.What does a thermistor do? (a) stores a little charge (b) lets current go one way (c) senses how hot it is (d) boosts a small signal
  34. 34.What does an LED do? (a) stores a little charge (b) smooths a wobbly supply (c) beeps for an alarm (d) glows using little power
  35. 35.🧩 Which component senses how hot it is? (a) transistor (b) buzzer (c) thermistor (d) potentiometer
  36. 36.What does a buzzer do? (a) senses how hot it is (b) glows using little power (c) turns a fan or wheels (d) makes a beeping sound
  37. 37.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  38. 38.True or false: an LED glows using little power. (a) False (b) True
  39. 39.What does a diode do? (a) beeps for an alarm (b) stores a little charge (c) lets current go one way (d) makes a beeping sound
  40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) transistor (d) thermistor

Answer key

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

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