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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 183 · 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 component boosts a small signal? (a) buzzer (b) fuse (c) transistor (d) diode
  2. 2.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) resistor (d) fuse
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  4. 4.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) boosts a small signal (d) stores a little charge
  5. 5.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) LED (d) transistor
  6. 6.What does a transistor do? (a) turns a fan or wheels (b) has coloured bands (c) stores a little charge (d) boosts a small signal
  7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  8. 8.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) makes a beeping sound (d) turns a fan or wheels
  9. 9.🧩 Which component makes a beeping sound? (a) diode (b) thermistor (c) LDR (d) buzzer
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  11. 11.True or false: a thermistor stores a little charge. (a) True (b) False
  12. 12.What does a potentiometer do? (a) blows if current is high (b) lets current go one way (c) senses how hot it is (d) is a resistance knob
  13. 13.True or false: a motor turns a fan or wheels. (a) False (b) True
  14. 14.True or false: a resistor makes a beeping sound. (a) True (b) False
  15. 15.🧩 Which component glows using little power? (a) LED (b) fuse (c) buzzer (d) resistor
  16. 16.True or false: a motor makes a beeping sound. (a) True (b) False
  17. 17.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) makes a beeping sound (d) boosts a small signal
  18. 18.🧩 Which component stores a little charge? (a) potentiometer (b) transistor (c) capacitor (d) resistor
  19. 19.True or false: a diode lets current go one way. (a) False (b) True
  20. 20.🧩 Which component limits the current? (a) thermistor (b) potentiometer (c) capacitor (d) resistor
  21. 21.True or false: a fuse glows using little power. (a) True (b) False
  22. 22.What does an LED do? (a) stores a little charge (b) limits the current (c) makes things spin (d) glows using little power
  23. 23.🧩 Which component senses how bright it is? (a) capacitor (b) potentiometer (c) diode (d) LDR
  24. 24.True or false: a diode makes a beeping sound. (a) False (b) True
  25. 25.What does a fuse do? (a) lets current go one way (b) is a resistance knob (c) blows if current is high (d) has coloured bands
  26. 26.True or false: a buzzer lets current go one way. (a) True (b) False
  27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
  28. 28.What does a resistor do? (a) makes things spin (b) is a resistance knob (c) limits the current (d) beeps for an alarm
  29. 29.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) buzzer (d) LED
  30. 30.True or false: an LED is a resistance knob. (a) True (b) False
  31. 31.True or false: a resistor has coloured bands. (a) True (b) False
  32. 32.True or false: an LED senses how bright it is. (a) False (b) True
  33. 33.What does a capacitor do? (a) has coloured bands (b) limits the current (c) blows if current is high (d) stores a little charge
  34. 34.True or false: a transistor boosts a small signal. (a) False (b) True
  35. 35.True or false: a potentiometer has coloured bands. (a) True (b) False
  36. 36.True or false: a fuse blows if current is high. (a) True (b) False
  37. 37.True or false: an LDR beeps for an alarm. (a) True (b) False
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.What does a motor do? (a) limits the current (b) has coloured bands (c) smooths a wobbly supply (d) makes things spin
  40. 40.True or false: a resistor limits the current. (a) True (b) False

Answer key

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

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