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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 640 · 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) diode (b) transistor (c) buzzer (d) potentiometer
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  3. 3.What does a potentiometer do? (a) smooths a wobbly supply (b) blows if current is high (c) is a resistance knob (d) glows using little power
  4. 4.🧩 Which component smooths a wobbly supply? (a) resistor (b) fuse (c) capacitor (d) motor
  5. 5.🧩 Which component is a resistance knob? (a) motor (b) LDR (c) potentiometer (d) fuse
  6. 6.What does a resistor do? (a) glows using little power (b) smooths a wobbly supply (c) limits the current (d) stores a little charge
  7. 7.🧩 Which component makes things spin? (a) capacitor (b) fuse (c) motor (d) LDR
  8. 8.True or false: a resistor limits the current. (a) False (b) True
  9. 9.🧩 Which component limits the current? (a) resistor (b) motor (c) fuse (d) LDR
  10. 10.True or false: a fuse blows if current is high. (a) False (b) True
  11. 11.What does a thermistor do? (a) senses how hot it is (b) has coloured bands (c) is a resistance knob (d) blows if current is high
  12. 12.True or false: a fuse lets current go one way. (a) False (b) True
  13. 13.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) limits the current (d) glows using little power
  14. 14.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  15. 15.What does a capacitor do? (a) glows using little power (b) blows if current is high (c) smooths a wobbly supply (d) senses how hot it is
  16. 16.True or false: a diode lets current go one way. (a) True (b) False
  17. 17.What does a fuse do? (a) beeps for an alarm (b) blows if current is high (c) has coloured bands (d) is a resistance knob
  18. 18.What does a buzzer do? (a) makes things spin (b) turns a fan or wheels (c) beeps for an alarm (d) smooths a wobbly supply
  19. 19.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) resistor (d) buzzer
  20. 20.What does an LDR do? (a) has coloured bands (b) smooths a wobbly supply (c) stores a little charge (d) senses how bright it is
  21. 21.True or false: an LED glows using little power. (a) False (b) True
  22. 22.True or false: a motor senses how bright it is. (a) False (b) True
  23. 23.🧩 Which component senses how bright it is? (a) motor (b) transistor (c) LDR (d) capacitor
  24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
  25. 25.True or false: a transistor is a resistance knob. (a) True (b) False
  26. 26.🧩 Which component senses how hot it is? (a) motor (b) buzzer (c) resistor (d) thermistor
  27. 27.What does an LED do? (a) glows using little power (b) limits the current (c) boosts a small signal (d) stores a little charge
  28. 28.🧩 Which component lets current go one way? (a) diode (b) resistor (c) potentiometer (d) fuse
  29. 29.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) makes things spin (d) lets current go one way
  30. 30.🧩 Which component stores a little charge? (a) LED (b) potentiometer (c) LDR (d) capacitor
  31. 31.🧩 Which component glows using little power? (a) transistor (b) potentiometer (c) LED (d) thermistor
  32. 32.True or false: a transistor boosts a small signal. (a) True (b) False
  33. 33.True or false: a potentiometer is a resistance knob. (a) False (b) True
  34. 34.True or false: a thermistor blows if current is high. (a) True (b) False
  35. 35.🧩 Which component has coloured bands? (a) LED (b) transistor (c) resistor (d) buzzer
  36. 36.🧩 Which component turns a fan or wheels? (a) capacitor (b) LDR (c) diode (d) motor
  37. 37.True or false: a resistor glows using little power. (a) True (b) False
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  39. 39.True or false: a potentiometer lets current go one way. (a) False (b) True
  40. 40.True or false: a transistor senses how bright it is. (a) False (b) True

Answer key

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

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