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Electronics Worksheet: Electronic Components

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

Answer key

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

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