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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 274 · 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.True or false: a resistor has coloured bands. (a) True (b) False
  2. 2.What does a resistor do? (a) makes things spin (b) has coloured bands (c) boosts a small signal (d) stores a little charge
  3. 3.🧩 Which component limits the current? (a) capacitor (b) potentiometer (c) fuse (d) resistor
  4. 4.🧩 Which component stores a little charge? (a) motor (b) transistor (c) capacitor (d) diode
  5. 5.True or false: a buzzer is a resistance knob. (a) False (b) True
  6. 6.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) transistor (d) resistor
  7. 7.What does an LDR do? (a) turns a fan or wheels (b) boosts a small signal (c) senses how bright it is (d) has coloured bands
  8. 8.What does a buzzer do? (a) smooths a wobbly supply (b) is a resistance knob (c) beeps for an alarm (d) lets current go one way
  9. 9.🧩 Which component has coloured bands? (a) motor (b) LED (c) fuse (d) resistor
  10. 10.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) transistor (d) fuse
  11. 11.What does an LED do? (a) glows using little power (b) stores a little charge (c) makes things spin (d) boosts a small signal
  12. 12.True or false: an LDR senses how bright it is. (a) True (b) False
  13. 13.True or false: a motor turns a fan or wheels. (a) True (b) False
  14. 14.True or false: an LED makes a beeping sound. (a) False (b) True
  15. 15.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) fuse (d) LED
  16. 16.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  17. 17.🧩 Which component makes things spin? (a) resistor (b) diode (c) fuse (d) motor
  18. 18.What does a diode do? (a) blows if current is high (b) lets current go one way (c) makes things spin (d) has coloured bands
  19. 19.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  20. 20.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) transistor (d) diode
  21. 21.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  22. 22.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  23. 23.🧩 Which component senses how bright it is? (a) motor (b) resistor (c) potentiometer (d) LDR
  24. 24.True or false: a potentiometer is a resistance knob. (a) True (b) False
  25. 25.🧩 Which component is a resistance knob? (a) motor (b) diode (c) capacitor (d) potentiometer
  26. 26.True or false: a buzzer senses how hot it is. (a) True (b) False
  27. 27.True or false: a buzzer beeps for an alarm. (a) True (b) False
  28. 28.🧩 Which component boosts a small signal? (a) buzzer (b) LED (c) resistor (d) transistor
  29. 29.True or false: a transistor limits the current. (a) False (b) True
  30. 30.True or false: a transistor glows using little power. (a) False (b) True
  31. 31.True or false: a resistor stores a little charge. (a) True (b) False
  32. 32.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) senses how hot it is (d) lets current go one way
  33. 33.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) limits the current (d) beeps for an alarm
  34. 34.True or false: a thermistor senses how hot it is. (a) True (b) False
  35. 35.True or false: a thermistor has coloured bands. (a) False (b) True
  36. 36.What does a thermistor do? (a) glows using little power (b) has coloured bands (c) senses how bright it is (d) senses how hot it is
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.What does a capacitor do? (a) blows if current is high (b) turns a fan or wheels (c) has coloured bands (d) stores a little charge
  39. 39.True or false: a fuse is a resistance knob. (a) True (b) False
  40. 40.True or false: a potentiometer limits the current. (a) True (b) False

Answer key

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

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