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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 289 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  2. 2.🧩 Which component glows using little power? (a) LDR (b) fuse (c) capacitor (d) LED
  3. 3.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) resistor (d) capacitor
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  5. 5.True or false: a potentiometer has coloured bands. (a) True (b) False
  6. 6.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LED (d) potentiometer
  7. 7.True or false: a resistor has coloured bands. (a) False (b) True
  8. 8.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) makes a beeping sound (d) smooths a wobbly supply
  9. 9.🧩 Which component senses how bright it is? (a) thermistor (b) potentiometer (c) transistor (d) LDR
  10. 10.True or false: a fuse boosts a small signal. (a) False (b) True
  11. 11.🧩 Which component senses how hot it is? (a) resistor (b) LDR (c) thermistor (d) diode
  12. 12.What does an LED do? (a) makes things spin (b) stores a little charge (c) glows using little power (d) senses how bright it is
  13. 13.🧩 Which component limits the current? (a) resistor (b) buzzer (c) fuse (d) LED
  14. 14.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  15. 15.True or false: a transistor senses how bright it is. (a) False (b) True
  16. 16.What does an LDR do? (a) senses how hot it is (b) blows if current is high (c) makes things spin (d) senses how bright it is
  17. 17.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) is a resistance knob (d) limits the current
  18. 18.What does a resistor do? (a) is a resistance knob (b) makes a beeping sound (c) has coloured bands (d) makes things spin
  19. 19.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) potentiometer (d) buzzer
  20. 20.🧩 Which component stores a little charge? (a) diode (b) resistor (c) motor (d) capacitor
  21. 21.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  22. 22.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) diode (d) LDR
  23. 23.🧩 Which component boosts a small signal? (a) resistor (b) thermistor (c) LDR (d) transistor
  24. 24.True or false: an LED boosts a small signal. (a) True (b) False
  25. 25.What does a buzzer do? (a) turns a fan or wheels (b) lets current go one way (c) makes a beeping sound (d) senses how hot it is
  26. 26.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  27. 27.True or false: a buzzer beeps for an alarm. (a) True (b) False
  28. 28.What does a transistor do? (a) turns a fan or wheels (b) limits the current (c) boosts a small signal (d) makes a beeping sound
  29. 29.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) glows using little power (d) turns a fan or wheels
  30. 30.What does a motor do? (a) senses how bright it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) senses how hot it is
  31. 31.True or false: a fuse blows if current is high. (a) True (b) False
  32. 32.True or false: a potentiometer stores a little charge. (a) True (b) False
  33. 33.True or false: an LED is a resistance knob. (a) True (b) False
  34. 34.🧩 Which component lets current go one way? (a) diode (b) LED (c) capacitor (d) buzzer
  35. 35.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) LED (d) capacitor
  36. 36.True or false: a resistor limits the current. (a) False (b) True
  37. 37.True or false: an LED lets current go one way. (a) True (b) False
  38. 38.True or false: a potentiometer lets current go one way. (a) True (b) False
  39. 39.True or false: a motor beeps for an alarm. (a) False (b) True
  40. 40.True or false: a motor blows if current is high. (a) False (b) True

Answer key

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

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