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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 169 · 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 motor (c) a resistor (d) an LED
  2. 2.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) LED (d) resistor
  3. 3.🧩 Which component lets current go one way? (a) resistor (b) diode (c) motor (d) LDR
  4. 4.What does a resistor do? (a) makes things spin (b) glows using little power (c) smooths a wobbly supply (d) limits the current
  5. 5.🧩 Which component stores a little charge? (a) potentiometer (b) motor (c) capacitor (d) LED
  6. 6.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) thermistor (d) LED
  7. 7.True or false: a potentiometer boosts a small signal. (a) False (b) True
  8. 8.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) turns a fan or wheels (d) is a resistance knob
  9. 9.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  10. 10.🧩 Which component boosts a small signal? (a) motor (b) potentiometer (c) transistor (d) fuse
  11. 11.True or false: a buzzer makes a beeping sound. (a) True (b) False
  12. 12.True or false: an LED glows using little power. (a) False (b) True
  13. 13.What does a buzzer do? (a) makes things spin (b) stores a little charge (c) blows if current is high (d) makes a beeping sound
  14. 14.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) motor (d) potentiometer
  15. 15.True or false: a capacitor senses how hot it is. (a) False (b) True
  16. 16.🧩 Which component senses how hot it is? (a) transistor (b) diode (c) buzzer (d) thermistor
  17. 17.🧩 Which component blows if current is high? (a) motor (b) LED (c) diode (d) fuse
  18. 18.🧩 Which component limits the current? (a) resistor (b) diode (c) buzzer (d) LED
  19. 19.What does a buzzer do? (a) boosts a small signal (b) limits the current (c) has coloured bands (d) beeps for an alarm
  20. 20.What does a thermistor do? (a) smooths a wobbly supply (b) limits the current (c) has coloured bands (d) senses how hot it is
  21. 21.True or false: a capacitor stores a little charge. (a) False (b) True
  22. 22.What does a transistor do? (a) stores a little charge (b) glows using little power (c) boosts a small signal (d) makes things spin
  23. 23.True or false: a motor turns a fan or wheels. (a) True (b) False
  24. 24.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) smooths a wobbly supply (d) stores a little charge
  25. 25.True or false: a resistor senses how bright it is. (a) False (b) True
  26. 26.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  27. 27.What does a potentiometer do? (a) makes things spin (b) makes a beeping sound (c) beeps for an alarm (d) is a resistance knob
  28. 28.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  29. 29.🧩 Which component makes a beeping sound? (a) thermistor (b) fuse (c) buzzer (d) resistor
  30. 30.What does a capacitor do? (a) is a resistance knob (b) beeps for an alarm (c) smooths a wobbly supply (d) boosts a small signal
  31. 31.What does a fuse do? (a) has coloured bands (b) turns a fan or wheels (c) makes a beeping sound (d) blows if current is high
  32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
  33. 33.True or false: a resistor stores a little charge. (a) True (b) False
  34. 34.True or false: a motor makes things spin. (a) True (b) False
  35. 35.True or false: an LDR makes things spin. (a) False (b) True
  36. 36.True or false: a resistor senses how hot it is. (a) True (b) False
  37. 37.What does a motor do? (a) limits the current (b) makes things spin (c) senses how hot it is (d) glows using little power
  38. 38.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) blows if current is high (d) lets current go one way
  39. 39.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  40. 40.True or false: a transistor makes a beeping sound. (a) True (b) False

Answer key

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

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