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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 181 · 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 part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  3. 3.True or false: a capacitor stores a little charge. (a) False (b) True
  4. 4.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) resistor (d) LED
  5. 5.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) LED (d) motor
  6. 6.🧩 Which component smooths a wobbly supply? (a) buzzer (b) transistor (c) capacitor (d) resistor
  7. 7.What does a buzzer do? (a) is a resistance knob (b) boosts a small signal (c) beeps for an alarm (d) lets current go one way
  8. 8.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) transistor (d) potentiometer
  9. 9.🧩 Which component makes a beeping sound? (a) resistor (b) LDR (c) potentiometer (d) buzzer
  10. 10.True or false: an LDR senses how bright it is. (a) True (b) False
  11. 11.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  12. 12.🧩 Which component lets current go one way? (a) buzzer (b) diode (c) resistor (d) motor
  13. 13.True or false: a fuse lets current go one way. (a) True (b) False
  14. 14.True or false: an LDR makes things spin. (a) False (b) True
  15. 15.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  16. 16.🧩 Which component boosts a small signal? (a) resistor (b) LDR (c) capacitor (d) transistor
  17. 17.What does a fuse do? (a) blows if current is high (b) glows using little power (c) beeps for an alarm (d) stores a little charge
  18. 18.What does an LED do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) glows using little power
  19. 19.What does a motor do? (a) turns a fan or wheels (b) blows if current is high (c) has coloured bands (d) beeps for an alarm
  20. 20.True or false: a buzzer beeps for an alarm. (a) False (b) True
  21. 21.What does a buzzer do? (a) is a resistance knob (b) makes a beeping sound (c) senses how bright it is (d) has coloured bands
  22. 22.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) LDR (d) diode
  23. 23.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) resistor (d) LDR
  24. 24.True or false: a resistor has coloured bands. (a) False (b) True
  25. 25.True or false: a resistor makes a beeping sound. (a) False (b) True
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.What does an LDR do? (a) has coloured bands (b) makes things spin (c) blows if current is high (d) senses how bright it is
  28. 28.True or false: a resistor limits the current. (a) True (b) False
  29. 29.What does a potentiometer do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) glows using little power
  30. 30.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) smooths a wobbly supply (d) stores a little charge
  31. 31.True or false: a buzzer makes a beeping sound. (a) True (b) False
  32. 32.True or false: a motor makes things spin. (a) True (b) False
  33. 33.True or false: a potentiometer is a resistance knob. (a) False (b) True
  34. 34.True or false: a thermistor senses how hot it is. (a) True (b) False
  35. 35.True or false: a fuse blows if current is high. (a) False (b) True
  36. 36.What does a resistor do? (a) glows using little power (b) boosts a small signal (c) has coloured bands (d) lets current go one way
  37. 37.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) makes things spin (d) limits the current
  38. 38.True or false: a resistor beeps for an alarm. (a) False (b) True
  39. 39.True or false: a buzzer makes things spin. (a) False (b) True
  40. 40.🧩 Which component glows using little power? (a) potentiometer (b) capacitor (c) motor (d) LED

Answer key

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

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