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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 670 · 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 an LDR do? (a) has coloured bands (b) makes things spin (c) is a resistance knob (d) senses how bright it is
  2. 2.True or false: a capacitor has coloured bands. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  4. 4.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) buzzer (d) LED
  5. 5.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) LDR (d) potentiometer
  6. 6.🧩 Which component has coloured bands? (a) LDR (b) buzzer (c) fuse (d) resistor
  7. 7.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) thermistor (d) capacitor
  8. 8.What does a potentiometer do? (a) has coloured bands (b) beeps for an alarm (c) turns a fan or wheels (d) is a resistance knob
  9. 9.🧩 Which component stores a little charge? (a) LED (b) transistor (c) capacitor (d) diode
  10. 10.🧩 Which component blows if current is high? (a) capacitor (b) LED (c) fuse (d) resistor
  11. 11.True or false: a thermistor turns a fan or wheels. (a) False (b) True
  12. 12.True or false: a motor turns a fan or wheels. (a) False (b) True
  13. 13.True or false: an LED beeps for an alarm. (a) True (b) False
  14. 14.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  15. 15.True or false: a capacitor stores a little charge. (a) True (b) False
  16. 16.True or false: an LED glows using little power. (a) True (b) False
  17. 17.True or false: a resistor lets current go one way. (a) False (b) True
  18. 18.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  19. 19.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) lets current go one way (d) turns a fan or wheels
  20. 20.True or false: a potentiometer boosts a small signal. (a) True (b) False
  21. 21.True or false: a resistor has coloured bands. (a) True (b) False
  22. 22.What does a motor do? (a) makes a beeping sound (b) has coloured bands (c) turns a fan or wheels (d) glows using little power
  23. 23.What does a buzzer do? (a) smooths a wobbly supply (b) makes things spin (c) stores a little charge (d) beeps for an alarm
  24. 24.What does a fuse do? (a) turns a fan or wheels (b) blows if current is high (c) smooths a wobbly supply (d) is a resistance knob
  25. 25.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) makes things spin (d) limits the current
  26. 26.True or false: an LED turns a fan or wheels. (a) True (b) False
  27. 27.What does a thermistor do? (a) turns a fan or wheels (b) beeps for an alarm (c) is a resistance knob (d) senses how hot it is
  28. 28.🧩 Which component boosts a small signal? (a) resistor (b) potentiometer (c) capacitor (d) transistor
  29. 29.True or false: a buzzer makes a beeping sound. (a) True (b) False
  30. 30.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) motor (d) diode
  31. 31.True or false: a transistor boosts a small signal. (a) True (b) False
  32. 32.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) motor (d) buzzer
  33. 33.What does a buzzer do? (a) limits the current (b) smooths a wobbly supply (c) makes a beeping sound (d) turns a fan or wheels
  34. 34.True or false: a resistor boosts a small signal. (a) False (b) True
  35. 35.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) capacitor (d) LED
  36. 36.True or false: a capacitor glows using little power. (a) True (b) False
  37. 37.🧩 Which component limits the current? (a) buzzer (b) capacitor (c) thermistor (d) resistor
  38. 38.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  39. 39.True or false: a resistor limits the current. (a) True (b) False
  40. 40.What does a motor do? (a) stores a little charge (b) beeps for an alarm (c) makes things spin (d) limits the current

Answer key

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

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