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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 710 · 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.What does a diode do? (a) stores a little charge (b) lets current go one way (c) blows if current is high (d) limits the current
  2. 2.🧩 Which component turns a fan or wheels? (a) LED (b) resistor (c) capacitor (d) motor
  3. 3.True or false: a motor turns a fan or wheels. (a) True (b) False
  4. 4.True or false: a resistor glows using little power. (a) False (b) True
  5. 5.What does a motor do? (a) makes a beeping sound (b) senses how bright it is (c) makes things spin (d) stores a little charge
  6. 6.🧩 Which component lets current go one way? (a) resistor (b) potentiometer (c) diode (d) thermistor
  7. 7.🧩 Which component makes things spin? (a) fuse (b) buzzer (c) diode (d) motor
  8. 8.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) blows if current is high (d) boosts a small signal
  9. 9.True or false: a capacitor beeps for an alarm. (a) False (b) True
  10. 10.True or false: a resistor limits the current. (a) False (b) True
  11. 11.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) has coloured bands (d) turns a fan or wheels
  12. 12.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) capacitor (d) diode
  13. 13.🧩 Which component has coloured bands? (a) fuse (b) thermistor (c) resistor (d) potentiometer
  14. 14.True or false: a capacitor stores a little charge. (a) True (b) False
  15. 15.True or false: a resistor has coloured bands. (a) True (b) False
  16. 16.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  17. 17.What does a motor do? (a) glows using little power (b) senses how hot it is (c) turns a fan or wheels (d) senses how bright it is
  18. 18.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  19. 19.What does a transistor do? (a) limits the current (b) blows if current is high (c) lets current go one way (d) boosts a small signal
  20. 20.What does a fuse do? (a) has coloured bands (b) is a resistance knob (c) blows if current is high (d) stores a little charge
  21. 21.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) transistor (d) LDR
  22. 22.🧩 Which component boosts a small signal? (a) thermistor (b) buzzer (c) motor (d) transistor
  23. 23.True or false: a buzzer beeps for an alarm. (a) False (b) True
  24. 24.True or false: an LED has coloured bands. (a) False (b) True
  25. 25.True or false: a fuse has coloured bands. (a) False (b) True
  26. 26.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) thermistor (d) LDR
  27. 27.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  28. 28.What does a thermistor do? (a) limits the current (b) smooths a wobbly supply (c) senses how hot it is (d) senses how bright it is
  29. 29.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  30. 30.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  31. 31.What does a resistor do? (a) stores a little charge (b) senses how bright it is (c) limits the current (d) senses how hot it is
  32. 32.What does a buzzer do? (a) beeps for an alarm (b) stores a little charge (c) boosts a small signal (d) senses how bright it is
  33. 33.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
  34. 34.True or false: a motor senses how hot it is. (a) True (b) False
  35. 35.True or false: an LDR beeps for an alarm. (a) False (b) True
  36. 36.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) LDR (d) resistor
  37. 37.True or false: a thermistor makes a beeping sound. (a) True (b) False
  38. 38.🧩 Which component smooths a wobbly supply? (a) resistor (b) fuse (c) capacitor (d) motor
  39. 39.True or false: an LDR senses how bright it is. (a) False (b) True
  40. 40.True or false: a fuse turns a fan or wheels. (a) True (b) False

Answer key

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

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