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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 455 · 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 resistor do? (a) blows if current is high (b) limits the current (c) lets current go one way (d) is a resistance knob
  2. 2.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) LDR (d) transistor
  3. 3.True or false: a motor makes a beeping sound. (a) False (b) True
  4. 4.True or false: a resistor makes things spin. (a) False (b) True
  5. 5.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) motor (d) thermistor
  6. 6.What does a capacitor do? (a) is a resistance knob (b) stores a little charge (c) senses how hot it is (d) limits the current
  7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) fuse (d) LDR
  8. 8.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  9. 9.What does a fuse do? (a) boosts a small signal (b) makes a beeping sound (c) blows if current is high (d) lets current go one way
  10. 10.True or false: a fuse blows if current is high. (a) True (b) False
  11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  12. 12.True or false: a thermistor boosts a small signal. (a) True (b) False
  13. 13.What does a resistor do? (a) makes things spin (b) boosts a small signal (c) stores a little charge (d) has coloured bands
  14. 14.🧩 Which component stores a little charge? (a) thermistor (b) diode (c) capacitor (d) fuse
  15. 15.🧩 Which component turns a fan or wheels? (a) LED (b) resistor (c) motor (d) LDR
  16. 16.True or false: an LDR senses how bright it is. (a) False (b) True
  17. 17.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  18. 18.🧩 Which component limits the current? (a) resistor (b) diode (c) thermistor (d) transistor
  19. 19.True or false: a transistor beeps for an alarm. (a) True (b) False
  20. 20.What does a capacitor do? (a) senses how hot it is (b) makes a beeping sound (c) boosts a small signal (d) smooths a wobbly supply
  21. 21.True or false: a capacitor stores a little charge. (a) True (b) False
  22. 22.🧩 Which component boosts a small signal? (a) motor (b) buzzer (c) thermistor (d) transistor
  23. 23.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) resistor (c) capacitor (d) transistor
  24. 24.True or false: an LDR beeps for an alarm. (a) False (b) True
  25. 25.🧩 Which component glows using little power? (a) LED (b) thermistor (c) transistor (d) diode
  26. 26.True or false: a resistor has coloured bands. (a) True (b) False
  27. 27.True or false: a potentiometer is a resistance knob. (a) False (b) True
  28. 28.🧩 Which component blows if current is high? (a) LED (b) motor (c) fuse (d) buzzer
  29. 29.True or false: an LDR blows if current is high. (a) True (b) False
  30. 30.🧩 Which component beeps for an alarm? (a) fuse (b) resistor (c) LED (d) buzzer
  31. 31.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) makes things spin (d) stores a little charge
  32. 32.🧩 Which component lets current go one way? (a) transistor (b) fuse (c) resistor (d) diode
  33. 33.True or false: an LED is a resistance knob. (a) False (b) True
  34. 34.What does an LDR do? (a) lets current go one way (b) beeps for an alarm (c) senses how bright it is (d) is a resistance knob
  35. 35.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) motor (d) buzzer
  36. 36.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) stores a little charge (d) smooths a wobbly supply
  37. 37.True or false: a motor stores a little charge. (a) False (b) True
  38. 38.What does a transistor do? (a) senses how hot it is (b) turns a fan or wheels (c) boosts a small signal (d) glows using little power
  39. 39.🧩 Which component makes things spin? (a) fuse (b) diode (c) buzzer (d) motor
  40. 40.🧩 Which component is a resistance knob? (a) diode (b) thermistor (c) LED (d) potentiometer

Answer key

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

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