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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 251 · 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) a motor (d) an LED
  2. 2.What does a resistor do? (a) glows using little power (b) limits the current (c) is a resistance knob (d) makes things spin
  3. 3.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) glows using little power (d) makes a beeping sound
  4. 4.🧩 Which component has coloured bands? (a) capacitor (b) buzzer (c) motor (d) resistor
  5. 5.🧩 Which component glows using little power? (a) thermistor (b) potentiometer (c) LED (d) capacitor
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  7. 7.True or false: an LDR senses how bright it is. (a) True (b) False
  8. 8.🧩 Which component limits the current? (a) capacitor (b) fuse (c) resistor (d) buzzer
  9. 9.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  10. 10.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) fuse (d) thermistor
  11. 11.🧩 Which component makes a beeping sound? (a) LDR (b) LED (c) buzzer (d) potentiometer
  12. 12.True or false: a fuse lets current go one way. (a) True (b) False
  13. 13.🧩 Which component lets current go one way? (a) fuse (b) LED (c) diode (d) thermistor
  14. 14.True or false: a motor makes things spin. (a) True (b) False
  15. 15.What does a transistor do? (a) blows if current is high (b) has coloured bands (c) boosts a small signal (d) lets current go one way
  16. 16.True or false: a potentiometer limits the current. (a) False (b) True
  17. 17.What does a motor do? (a) smooths a wobbly supply (b) boosts a small signal (c) makes things spin (d) beeps for an alarm
  18. 18.🧩 Which component senses how hot it is? (a) resistor (b) capacitor (c) LED (d) thermistor
  19. 19.🧩 Which component senses how bright it is? (a) capacitor (b) thermistor (c) LDR (d) motor
  20. 20.True or false: a resistor turns a fan or wheels. (a) True (b) False
  21. 21.True or false: a thermistor blows if current is high. (a) False (b) True
  22. 22.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) buzzer (d) diode
  23. 23.True or false: a resistor has coloured bands. (a) False (b) True
  24. 24.True or false: a buzzer makes a beeping sound. (a) False (b) True
  25. 25.True or false: a transistor boosts a small signal. (a) True (b) False
  26. 26.What does a capacitor do? (a) makes things spin (b) is a resistance knob (c) beeps for an alarm (d) smooths a wobbly supply
  27. 27.🧩 Which component turns a fan or wheels? (a) LDR (b) fuse (c) motor (d) capacitor
  28. 28.What does a fuse do? (a) makes a beeping sound (b) glows using little power (c) blows if current is high (d) lets current go one way
  29. 29.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  30. 30.What does an LED do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) boosts a small signal
  31. 31.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) LED (d) potentiometer
  32. 32.🧩 Which component blows if current is high? (a) LDR (b) thermistor (c) fuse (d) diode
  33. 33.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component smooths a wobbly supply? (a) LED (b) resistor (c) capacitor (d) motor
  35. 35.True or false: an LED glows using little power. (a) False (b) True
  36. 36.🧩 Which component makes things spin? (a) LED (b) motor (c) LDR (d) capacitor
  37. 37.What does a diode do? (a) lets current go one way (b) glows using little power (c) turns a fan or wheels (d) limits the current
  38. 38.True or false: a buzzer senses how bright it is. (a) True (b) False
  39. 39.What does a buzzer do? (a) smooths a wobbly supply (b) beeps for an alarm (c) limits the current (d) blows if current is high
  40. 40.What does a resistor do? (a) blows if current is high (b) makes things spin (c) is a resistance knob (d) has coloured bands

Answer key

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

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