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Electronics Worksheet: Electronic Components

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

Answer key

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

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