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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 138 · 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.True or false: a diode makes things spin. (a) True (b) False
  2. 2.What does a potentiometer do? (a) lets current go one way (b) glows using little power (c) stores a little charge (d) is a resistance knob
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  4. 4.What does a capacitor do? (a) stores a little charge (b) makes things spin (c) makes a beeping sound (d) limits the current
  5. 5.🧩 Which component limits the current? (a) LDR (b) resistor (c) diode (d) LED
  6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  7. 7.True or false: a potentiometer is a resistance knob. (a) True (b) False
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  9. 9.What does an LDR do? (a) senses how hot it is (b) blows if current is high (c) senses how bright it is (d) lets current go one way
  10. 10.True or false: a capacitor stores a little charge. (a) False (b) True
  11. 11.True or false: a transistor makes a beeping sound. (a) False (b) True
  12. 12.True or false: a resistor boosts a small signal. (a) False (b) True
  13. 13.True or false: a buzzer beeps for an alarm. (a) True (b) False
  14. 14.True or false: a transistor boosts a small signal. (a) False (b) True
  15. 15.True or false: an LDR stores a little charge. (a) True (b) False
  16. 16.🧩 Which component has coloured bands? (a) LED (b) fuse (c) resistor (d) thermistor
  17. 17.True or false: an LED blows if current is high. (a) False (b) True
  18. 18.🧩 Which component boosts a small signal? (a) fuse (b) LED (c) buzzer (d) transistor
  19. 19.What does a motor do? (a) lets current go one way (b) limits the current (c) turns a fan or wheels (d) smooths a wobbly supply
  20. 20.🧩 Which component senses how bright it is? (a) motor (b) capacitor (c) resistor (d) LDR
  21. 21.🧩 Which component turns a fan or wheels? (a) transistor (b) LDR (c) motor (d) capacitor
  22. 22.What does a buzzer do? (a) limits the current (b) has coloured bands (c) makes a beeping sound (d) smooths a wobbly supply
  23. 23.True or false: an LED limits the current. (a) True (b) False
  24. 24.What does a resistor do? (a) limits the current (b) glows using little power (c) turns a fan or wheels (d) stores a little charge
  25. 25.What does a diode do? (a) makes things spin (b) limits the current (c) turns a fan or wheels (d) lets current go one way
  26. 26.🧩 Which component makes a beeping sound? (a) motor (b) thermistor (c) buzzer (d) LDR
  27. 27.🧩 Which component glows using little power? (a) transistor (b) resistor (c) LED (d) diode
  28. 28.True or false: a transistor glows using little power. (a) True (b) False
  29. 29.What does a fuse do? (a) blows if current is high (b) senses how bright it is (c) lets current go one way (d) makes a beeping sound
  30. 30.🧩 Which component stores a little charge? (a) transistor (b) diode (c) capacitor (d) motor
  31. 31.🧩 Which component smooths a wobbly supply? (a) diode (b) resistor (c) capacitor (d) transistor
  32. 32.True or false: a motor limits the current. (a) True (b) False
  33. 33.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) potentiometer (d) resistor
  34. 34.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) is a resistance knob
  35. 35.True or false: a thermistor boosts a small signal. (a) True (b) False
  36. 36.What does an LED do? (a) senses how bright it is (b) glows using little power (c) turns a fan or wheels (d) stores a little charge
  37. 37.True or false: a motor beeps for an alarm. (a) False (b) True
  38. 38.🧩 Which component makes things spin? (a) resistor (b) capacitor (c) motor (d) diode
  39. 39.True or false: a buzzer is a resistance knob. (a) True (b) False
  40. 40.True or false: a buzzer blows if current is high. (a) False (b) True

Answer key

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

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