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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 159 · 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 makes things spin? (a) capacitor (b) transistor (c) LED (d) motor
  2. 2.True or false: a motor boosts a small signal. (a) True (b) False
  3. 3.True or false: a fuse is a resistance knob. (a) False (b) True
  4. 4.🧩 Which component blows if current is high? (a) potentiometer (b) thermistor (c) resistor (d) fuse
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  6. 6.🧩 Which component smooths a wobbly supply? (a) buzzer (b) diode (c) capacitor (d) resistor
  7. 7.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  9. 9.🧩 Which component senses how hot it is? (a) potentiometer (b) diode (c) thermistor (d) capacitor
  10. 10.What does a potentiometer do? (a) makes things spin (b) senses how bright it is (c) blows if current is high (d) is a resistance knob
  11. 11.True or false: a potentiometer is a resistance knob. (a) False (b) True
  12. 12.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) transistor (d) capacitor
  13. 13.True or false: a capacitor stores a little charge. (a) True (b) False
  14. 14.🧩 Which component lets current go one way? (a) resistor (b) capacitor (c) motor (d) diode
  15. 15.What does a capacitor do? (a) has coloured bands (b) limits the current (c) makes a beeping sound (d) stores a little charge
  16. 16.What does a resistor do? (a) glows using little power (b) boosts a small signal (c) limits the current (d) stores a little charge
  17. 17.What does an LDR do? (a) senses how hot it is (b) makes things spin (c) senses how bright it is (d) glows using little power
  18. 18.True or false: a resistor lets current go one way. (a) False (b) True
  19. 19.What does a transistor do? (a) limits the current (b) boosts a small signal (c) beeps for an alarm (d) senses how hot it is
  20. 20.True or false: a motor is a resistance knob. (a) True (b) False
  21. 21.True or false: an LED blows if current is high. (a) False (b) True
  22. 22.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) thermistor (d) buzzer
  23. 23.🧩 Which component beeps for an alarm? (a) potentiometer (b) transistor (c) motor (d) buzzer
  24. 24.True or false: a transistor makes a beeping sound. (a) True (b) False
  25. 25.True or false: a thermistor stores a little charge. (a) True (b) False
  26. 26.True or false: a thermistor is a resistance knob. (a) False (b) True
  27. 27.True or false: a transistor senses how hot it is. (a) True (b) False
  28. 28.True or false: a transistor boosts a small signal. (a) True (b) False
  29. 29.What does a motor do? (a) makes things spin (b) lets current go one way (c) beeps for an alarm (d) senses how bright it is
  30. 30.🧩 Which component limits the current? (a) resistor (b) capacitor (c) buzzer (d) potentiometer
  31. 31.True or false: a fuse blows if current is high. (a) True (b) False
  32. 32.True or false: a thermistor limits the current. (a) True (b) False
  33. 33.🧩 Which component senses how bright it is? (a) fuse (b) capacitor (c) motor (d) LDR
  34. 34.What does a diode do? (a) lets current go one way (b) turns a fan or wheels (c) blows if current is high (d) boosts a small signal
  35. 35.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) diode (d) resistor
  36. 36.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) buzzer (d) thermistor
  37. 37.True or false: a buzzer beeps for an alarm. (a) False (b) True
  38. 38.True or false: a fuse makes things spin. (a) True (b) False
  39. 39.🧩 Which component turns a fan or wheels? (a) capacitor (b) LED (c) potentiometer (d) motor
  40. 40.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) thermistor (d) transistor

Answer key

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

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