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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 577 · 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 potentiometer do? (a) is a resistance knob (b) blows if current is high (c) senses how bright it is (d) smooths a wobbly supply
  2. 2.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) LDR (d) resistor
  3. 3.True or false: a buzzer has coloured bands. (a) True (b) False
  4. 4.🧩 Which component boosts a small signal? (a) potentiometer (b) capacitor (c) transistor (d) fuse
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  6. 6.What does a fuse do? (a) stores a little charge (b) blows if current is high (c) has coloured bands (d) makes things spin
  7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  8. 8.True or false: a diode lets current go one way. (a) False (b) True
  9. 9.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) diode (d) resistor
  10. 10.True or false: a thermistor senses how hot it is. (a) False (b) True
  11. 11.What does a resistor do? (a) stores a little charge (b) glows using little power (c) beeps for an alarm (d) has coloured bands
  12. 12.What does a buzzer do? (a) blows if current is high (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  13. 13.True or false: an LDR blows if current is high. (a) True (b) False
  14. 14.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) is a resistance knob (d) makes things spin
  15. 15.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) has coloured bands (d) makes a beeping sound
  16. 16.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) boosts a small signal (d) blows if current is high
  17. 17.True or false: a buzzer beeps for an alarm. (a) False (b) True
  18. 18.🧩 Which component glows using little power? (a) motor (b) resistor (c) LED (d) capacitor
  19. 19.True or false: a buzzer makes a beeping sound. (a) True (b) False
  20. 20.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) has coloured bands (d) stores a little charge
  21. 21.🧩 Which component is a resistance knob? (a) LDR (b) LED (c) potentiometer (d) buzzer
  22. 22.What does an LED do? (a) senses how bright it is (b) blows if current is high (c) glows using little power (d) boosts a small signal
  23. 23.🧩 Which component smooths a wobbly supply? (a) buzzer (b) motor (c) capacitor (d) resistor
  24. 24.True or false: a resistor lets current go one way. (a) True (b) False
  25. 25.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  26. 26.True or false: a capacitor senses how hot it is. (a) False (b) True
  27. 27.What does a motor do? (a) boosts a small signal (b) stores a little charge (c) senses how hot it is (d) turns a fan or wheels
  28. 28.🧩 Which component blows if current is high? (a) resistor (b) transistor (c) fuse (d) capacitor
  29. 29.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  30. 30.What does a buzzer do? (a) smooths a wobbly supply (b) boosts a small signal (c) glows using little power (d) makes a beeping sound
  31. 31.True or false: a fuse makes things spin. (a) True (b) False
  32. 32.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) resistor (d) motor
  33. 33.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) resistor (d) LDR
  34. 34.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) transistor (d) motor
  35. 35.🧩 Which component senses how bright it is? (a) LDR (b) diode (c) potentiometer (d) fuse
  36. 36.🧩 Which component limits the current? (a) motor (b) capacitor (c) diode (d) resistor
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.True or false: a fuse has coloured bands. (a) False (b) True
  40. 40.True or false: a buzzer senses how hot it is. (a) True (b) False

Answer key

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

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