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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 489 · 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 component limits the current? (a) LDR (b) thermistor (c) resistor (d) transistor
  2. 2.True or false: a buzzer beeps for an alarm. (a) True (b) False
  3. 3.🧩 Which component beeps for an alarm? (a) transistor (b) LDR (c) buzzer (d) capacitor
  4. 4.🧩 Which component stores a little charge? (a) capacitor (b) fuse (c) resistor (d) buzzer
  5. 5.True or false: a transistor boosts a small signal. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) resistor (b) transistor (c) fuse (d) motor
  7. 7.True or false: a resistor lets current go one way. (a) True (b) False
  8. 8.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  9. 9.🧩 Which component is a resistance knob? (a) transistor (b) buzzer (c) fuse (d) potentiometer
  10. 10.True or false: a transistor turns a fan or wheels. (a) False (b) True
  11. 11.True or false: a resistor makes things spin. (a) True (b) False
  12. 12.True or false: a resistor has coloured bands. (a) True (b) False
  13. 13.What does a diode do? (a) turns a fan or wheels (b) blows if current is high (c) glows using little power (d) lets current go one way
  14. 14.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  15. 15.What does an LDR do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) senses how bright it is
  16. 16.What does a fuse do? (a) glows using little power (b) blows if current is high (c) is a resistance knob (d) boosts a small signal
  17. 17.🧩 Which component turns a fan or wheels? (a) fuse (b) resistor (c) motor (d) transistor
  18. 18.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) thermistor (c) capacitor (d) buzzer
  19. 19.🧩 Which component blows if current is high? (a) potentiometer (b) capacitor (c) fuse (d) motor
  20. 20.🧩 Which component senses how bright it is? (a) buzzer (b) resistor (c) LDR (d) fuse
  21. 21.True or false: a thermistor makes things spin. (a) True (b) False
  22. 22.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) stores a little charge (d) senses how hot it is
  23. 23.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  24. 24.🧩 Which component boosts a small signal? (a) LDR (b) resistor (c) buzzer (d) transistor
  25. 25.What does a motor do? (a) boosts a small signal (b) turns a fan or wheels (c) lets current go one way (d) senses how hot it is
  26. 26.What does a capacitor do? (a) makes a beeping sound (b) senses how bright it is (c) has coloured bands (d) stores a little charge
  27. 27.True or false: a thermistor boosts a small signal. (a) True (b) False
  28. 28.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  29. 29.True or false: a buzzer makes a beeping sound. (a) True (b) False
  30. 30.🧩 Which component makes things spin? (a) capacitor (b) potentiometer (c) motor (d) transistor
  31. 31.What does a potentiometer do? (a) lets current go one way (b) senses how bright it is (c) is a resistance knob (d) smooths a wobbly supply
  32. 32.True or false: a potentiometer is a resistance knob. (a) False (b) True
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.🧩 Which component lets current go one way? (a) transistor (b) diode (c) motor (d) capacitor
  35. 35.🧩 Which component makes a beeping sound? (a) potentiometer (b) LDR (c) buzzer (d) thermistor
  36. 36.🧩 Which component glows using little power? (a) buzzer (b) LED (c) resistor (d) LDR
  37. 37.What does an LED do? (a) blows if current is high (b) glows using little power (c) limits the current (d) lets current go one way
  38. 38.True or false: an LDR beeps for an alarm. (a) False (b) True
  39. 39.True or false: a potentiometer stores a little charge. (a) True (b) False
  40. 40.True or false: an LED senses how bright it is. (a) False (b) True

Answer key

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

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