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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 97 · 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 thermistor do? (a) limits the current (b) beeps for an alarm (c) glows using little power (d) senses how hot it is
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  4. 4.True or false: a diode glows using little power. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  6. 6.True or false: a transistor boosts a small signal. (a) True (b) False
  7. 7.What does a motor do? (a) senses how hot it is (b) blows if current is high (c) turns a fan or wheels (d) stores a little charge
  8. 8.What does a diode do? (a) glows using little power (b) turns a fan or wheels (c) lets current go one way (d) limits the current
  9. 9.🧩 Which component boosts a small signal? (a) thermistor (b) buzzer (c) LED (d) transistor
  10. 10.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) boosts a small signal (d) is a resistance knob
  11. 11.True or false: a buzzer limits the current. (a) False (b) True
  12. 12.What does a buzzer do? (a) makes things spin (b) stores a little charge (c) senses how hot it is (d) beeps for an alarm
  13. 13.True or false: a capacitor stores a little charge. (a) True (b) False
  14. 14.🧩 Which component makes things spin? (a) LED (b) buzzer (c) fuse (d) motor
  15. 15.What does an LED do? (a) beeps for an alarm (b) smooths a wobbly supply (c) stores a little charge (d) glows using little power
  16. 16.True or false: a potentiometer limits the current. (a) False (b) True
  17. 17.True or false: a motor makes a beeping sound. (a) True (b) False
  18. 18.True or false: a thermistor stores a little charge. (a) False (b) True
  19. 19.What does a transistor do? (a) beeps for an alarm (b) makes a beeping sound (c) boosts a small signal (d) limits the current
  20. 20.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) lets current go one way (d) makes things spin
  21. 21.🧩 Which component stores a little charge? (a) potentiometer (b) motor (c) diode (d) capacitor
  22. 22.True or false: an LED senses how hot it is. (a) True (b) False
  23. 23.True or false: a buzzer beeps for an alarm. (a) False (b) True
  24. 24.🧩 Which component lets current go one way? (a) resistor (b) LDR (c) buzzer (d) diode
  25. 25.True or false: a resistor has coloured bands. (a) True (b) False
  26. 26.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) makes things spin (d) makes a beeping sound
  27. 27.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) is a resistance knob (d) beeps for an alarm
  28. 28.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) resistor (d) thermistor
  29. 29.🧩 Which component limits the current? (a) LED (b) resistor (c) diode (d) LDR
  30. 30.True or false: a motor stores a little charge. (a) True (b) False
  31. 31.🧩 Which component blows if current is high? (a) buzzer (b) LDR (c) fuse (d) capacitor
  32. 32.🧩 Which component senses how bright it is? (a) LDR (b) transistor (c) diode (d) resistor
  33. 33.What does a resistor do? (a) is a resistance knob (b) smooths a wobbly supply (c) limits the current (d) blows if current is high
  34. 34.🧩 Which component has coloured bands? (a) diode (b) LDR (c) resistor (d) potentiometer
  35. 35.What does a potentiometer do? (a) is a resistance knob (b) beeps for an alarm (c) limits the current (d) senses how hot it is
  36. 36.True or false: an LDR makes things spin. (a) False (b) True
  37. 37.🧩 Which component makes a beeping sound? (a) thermistor (b) capacitor (c) resistor (d) buzzer
  38. 38.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  39. 39.True or false: a resistor limits the current. (a) True (b) False
  40. 40.True or false: an LDR is a resistance knob. (a) False (b) True

Answer key

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

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