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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 306 · 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.True or false: a diode makes things spin. (a) False (b) True
  2. 2.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) makes a beeping sound (d) lets current go one way
  3. 3.True or false: a fuse has coloured bands. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  5. 5.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  6. 6.What does a buzzer do? (a) stores a little charge (b) is a resistance knob (c) makes a beeping sound (d) limits the current
  7. 7.What does an LDR do? (a) makes a beeping sound (b) lets current go one way (c) stores a little charge (d) senses how bright it is
  8. 8.What does a fuse do? (a) turns a fan or wheels (b) stores a little charge (c) has coloured bands (d) blows if current is high
  9. 9.What does an LED do? (a) limits the current (b) senses how bright it is (c) has coloured bands (d) glows using little power
  10. 10.🧩 Which component has coloured bands? (a) resistor (b) LED (c) buzzer (d) motor
  11. 11.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) limits the current (d) makes things spin
  12. 12.🧩 Which component limits the current? (a) buzzer (b) fuse (c) resistor (d) LDR
  13. 13.True or false: a buzzer limits the current. (a) False (b) True
  14. 14.🧩 Which component senses how bright it is? (a) resistor (b) diode (c) LDR (d) LED
  15. 15.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) glows using little power
  16. 16.🧩 Which component makes things spin? (a) resistor (b) capacitor (c) motor (d) fuse
  17. 17.What does a diode do? (a) glows using little power (b) blows if current is high (c) lets current go one way (d) makes a beeping sound
  18. 18.True or false: a potentiometer is a resistance knob. (a) False (b) True
  19. 19.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  20. 20.🧩 Which component glows using little power? (a) resistor (b) thermistor (c) capacitor (d) LED
  21. 21.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) capacitor (d) resistor
  22. 22.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) fuse (d) thermistor
  23. 23.True or false: an LDR is a resistance knob. (a) False (b) True
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.True or false: a fuse blows if current is high. (a) False (b) True
  26. 26.True or false: a motor stores a little charge. (a) False (b) True
  27. 27.True or false: a resistor boosts a small signal. (a) True (b) False
  28. 28.True or false: a resistor has coloured bands. (a) False (b) True
  29. 29.🧩 Which component stores a little charge? (a) thermistor (b) capacitor (c) diode (d) resistor
  30. 30.True or false: a capacitor beeps for an alarm. (a) False (b) True
  31. 31.What does a resistor do? (a) makes things spin (b) senses how hot it is (c) boosts a small signal (d) has coloured bands
  32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
  33. 33.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) LED (d) motor
  34. 34.True or false: a potentiometer senses how hot it is. (a) False (b) True
  35. 35.🧩 Which component is a resistance knob? (a) resistor (b) transistor (c) LED (d) potentiometer
  36. 36.🧩 Which component lets current go one way? (a) motor (b) resistor (c) diode (d) fuse
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.True or false: a resistor glows using little power. (a) True (b) False
  39. 39.What does a thermistor do? (a) stores a little charge (b) has coloured bands (c) senses how hot it is (d) is a resistance knob
  40. 40.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) potentiometer (d) capacitor

Answer key

  1. False
  2. smooths a wobbly supply
  3. False
  4. a buzzer
  5. store charge briefly
  6. makes a beeping sound
  7. senses how bright it is
  8. blows if current is high
  9. glows using little power
  10. resistor
  11. is a resistance knob
  12. resistor
  13. False
  14. LDR
  15. stores a little charge
  16. motor
  17. lets current go one way
  18. True
  19. a motor
  20. LED
  21. thermistor
  22. buzzer
  23. False
  24. True
  25. True
  26. False
  27. False
  28. True
  29. capacitor
  30. False
  31. has coloured bands
  32. True
  33. buzzer
  34. False
  35. potentiometer
  36. diode
  37. True
  38. False
  39. senses how hot it is
  40. motor

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