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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 488 · 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 motor do? (a) senses how hot it is (b) boosts a small signal (c) blows if current is high (d) makes things spin
  2. 2.What does an LDR do? (a) is a resistance knob (b) limits the current (c) smooths a wobbly supply (d) senses how bright it is
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  4. 4.🧩 Which component makes things spin? (a) resistor (b) transistor (c) capacitor (d) motor
  5. 5.🧩 Which component smooths a wobbly supply? (a) resistor (b) transistor (c) diode (d) capacitor
  6. 6.True or false: a buzzer makes a beeping sound. (a) True (b) False
  7. 7.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) resistor (d) fuse
  8. 8.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) transistor (d) thermistor
  9. 9.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) senses how bright it is (d) beeps for an alarm
  10. 10.🧩 Which component has coloured bands? (a) buzzer (b) capacitor (c) resistor (d) diode
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  12. 12.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
  13. 13.True or false: an LDR limits the current. (a) False (b) True
  14. 14.True or false: a transistor makes things spin. (a) True (b) False
  15. 15.True or false: an LDR stores a little charge. (a) True (b) False
  16. 16.🧩 Which component limits the current? (a) resistor (b) diode (c) thermistor (d) buzzer
  17. 17.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) limits the current (d) senses how bright it is
  18. 18.What does a resistor do? (a) limits the current (b) glows using little power (c) boosts a small signal (d) lets current go one way
  19. 19.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  20. 20.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) LDR (d) transistor
  21. 21.True or false: a thermistor makes a beeping sound. (a) True (b) False
  22. 22.🧩 Which component makes a beeping sound? (a) motor (b) capacitor (c) buzzer (d) LED
  23. 23.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) resistor (d) capacitor
  24. 24.🧩 Which component senses how hot it is? (a) buzzer (b) LDR (c) capacitor (d) thermistor
  25. 25.True or false: a potentiometer is a resistance knob. (a) False (b) True
  26. 26.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) fuse (d) capacitor
  27. 27.True or false: a buzzer boosts a small signal. (a) True (b) False
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.True or false: a fuse stores a little charge. (a) True (b) False
  30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
  31. 31.What does a fuse do? (a) blows if current is high (b) makes things spin (c) senses how hot it is (d) turns a fan or wheels
  32. 32.What does an LED do? (a) glows using little power (b) smooths a wobbly supply (c) makes things spin (d) limits the current
  33. 33.True or false: an LED is a resistance knob. (a) True (b) False
  34. 34.True or false: an LDR makes a beeping sound. (a) True (b) False
  35. 35.True or false: a capacitor stores a little charge. (a) True (b) False
  36. 36.True or false: a capacitor lets current go one way. (a) True (b) False
  37. 37.What does a potentiometer do? (a) glows using little power (b) senses how hot it is (c) blows if current is high (d) is a resistance knob
  38. 38.🧩 Which component glows using little power? (a) fuse (b) capacitor (c) LED (d) thermistor
  39. 39.🧩 Which component beeps for an alarm? (a) LDR (b) LED (c) thermistor (d) buzzer
  40. 40.True or false: a capacitor has coloured bands. (a) True (b) False

Answer key

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

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