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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 379 · 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 senses how bright it is? (a) potentiometer (b) capacitor (c) buzzer (d) LDR
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  3. 3.🧩 Which component glows using little power? (a) buzzer (b) capacitor (c) transistor (d) LED
  4. 4.🧩 Which component senses how hot it is? (a) capacitor (b) transistor (c) thermistor (d) LDR
  5. 5.What does an LED do? (a) boosts a small signal (b) is a resistance knob (c) glows using little power (d) makes things spin
  6. 6.🧩 Which component blows if current is high? (a) thermistor (b) LDR (c) fuse (d) resistor
  7. 7.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  8. 8.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) lets current go one way (d) has coloured bands
  9. 9.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) fuse (d) LED
  10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  11. 11.🧩 Which component makes things spin? (a) motor (b) buzzer (c) diode (d) transistor
  12. 12.🧩 Which component turns a fan or wheels? (a) resistor (b) LED (c) transistor (d) motor
  13. 13.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
  14. 14.True or false: a buzzer glows using little power. (a) False (b) True
  15. 15.🧩 Which component lets current go one way? (a) buzzer (b) potentiometer (c) diode (d) motor
  16. 16.True or false: a fuse blows if current is high. (a) False (b) True
  17. 17.True or false: an LED senses how hot it is. (a) False (b) True
  18. 18.True or false: a diode lets current go one way. (a) False (b) True
  19. 19.🧩 Which component limits the current? (a) transistor (b) diode (c) resistor (d) motor
  20. 20.What does a fuse do? (a) senses how hot it is (b) turns a fan or wheels (c) blows if current is high (d) stores a little charge
  21. 21.What does a resistor do? (a) boosts a small signal (b) senses how hot it is (c) turns a fan or wheels (d) has coloured bands
  22. 22.True or false: a diode stores a little charge. (a) True (b) False
  23. 23.What does an LDR do? (a) stores a little charge (b) boosts a small signal (c) glows using little power (d) senses how bright it is
  24. 24.What does a diode do? (a) makes things spin (b) turns a fan or wheels (c) smooths a wobbly supply (d) lets current go one way
  25. 25.What does a motor do? (a) beeps for an alarm (b) turns a fan or wheels (c) senses how hot it is (d) senses how bright it is
  26. 26.True or false: a potentiometer senses how bright it is. (a) True (b) False
  27. 27.True or false: a motor makes things spin. (a) False (b) True
  28. 28.True or false: a diode has coloured bands. (a) False (b) True
  29. 29.What does a thermistor do? (a) blows if current is high (b) limits the current (c) senses how hot it is (d) senses how bright it is
  30. 30.True or false: a resistor senses how bright it is. (a) False (b) True
  31. 31.🧩 Which component makes a beeping sound? (a) potentiometer (b) resistor (c) capacitor (d) buzzer
  32. 32.True or false: a potentiometer is a resistance knob. (a) False (b) True
  33. 33.What does a potentiometer do? (a) stores a little charge (b) senses how hot it is (c) is a resistance knob (d) limits the current
  34. 34.🧩 Which component smooths a wobbly supply? (a) fuse (b) resistor (c) capacitor (d) buzzer
  35. 35.True or false: an LDR makes a beeping sound. (a) False (b) True
  36. 36.🧩 Which component is a resistance knob? (a) motor (b) resistor (c) potentiometer (d) transistor
  37. 37.True or false: an LDR senses how bright it is. (a) False (b) True
  38. 38.True or false: an LED makes a beeping sound. (a) True (b) False
  39. 39.True or false: a thermistor blows if current is high. (a) False (b) True
  40. 40.True or false: a capacitor stores a little charge. (a) False (b) True

Answer key

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

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