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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 290 · 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 potentiometer is a resistance knob. (a) True (b) False
  2. 2.What does a buzzer do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) lets current go one way
  3. 3.True or false: a motor makes things spin. (a) True (b) False
  4. 4.🧩 Which component limits the current? (a) motor (b) resistor (c) fuse (d) LDR
  5. 5.What does a capacitor do? (a) blows if current is high (b) limits the current (c) glows using little power (d) stores a little charge
  6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  7. 7.What does a capacitor do? (a) smooths a wobbly supply (b) is a resistance knob (c) lets current go one way (d) has coloured bands
  8. 8.🧩 Which component blows if current is high? (a) transistor (b) buzzer (c) diode (d) fuse
  9. 9.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) resistor (d) LDR
  10. 10.🧩 Which component makes things spin? (a) LED (b) capacitor (c) motor (d) thermistor
  11. 11.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) beeps for an alarm (d) senses how hot it is
  12. 12.What does an LED do? (a) stores a little charge (b) makes a beeping sound (c) makes things spin (d) glows using little power
  13. 13.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  14. 14.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) boosts a small signal (d) senses how hot it is
  15. 15.True or false: an LED glows using little power. (a) False (b) True
  16. 16.What does a buzzer do? (a) makes things spin (b) stores a little charge (c) is a resistance knob (d) beeps for an alarm
  17. 17.True or false: a resistor beeps for an alarm. (a) False (b) True
  18. 18.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) buzzer (d) diode
  19. 19.True or false: a capacitor stores a little charge. (a) True (b) False
  20. 20.True or false: an LED blows if current is high. (a) True (b) False
  21. 21.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) capacitor (d) transistor
  22. 22.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) LED (d) resistor
  23. 23.🧩 Which component beeps for an alarm? (a) fuse (b) LED (c) capacitor (d) buzzer
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  25. 25.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) LED (d) fuse
  26. 26.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) capacitor (d) diode
  27. 27.True or false: a resistor has coloured bands. (a) False (b) True
  28. 28.What does a potentiometer do? (a) limits the current (b) senses how bright it is (c) makes a beeping sound (d) is a resistance knob
  29. 29.🧩 Which component turns a fan or wheels? (a) LDR (b) fuse (c) LED (d) motor
  30. 30.What does a thermistor do? (a) turns a fan or wheels (b) makes things spin (c) senses how hot it is (d) stores a little charge
  31. 31.True or false: a diode makes a beeping sound. (a) False (b) True
  32. 32.True or false: a buzzer glows using little power. (a) False (b) True
  33. 33.True or false: a resistor glows using little power. (a) False (b) True
  34. 34.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) resistor (d) potentiometer
  35. 35.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  36. 36.What does a transistor do? (a) has coloured bands (b) makes a beeping sound (c) boosts a small signal (d) senses how bright it is
  37. 37.True or false: an LDR senses how bright it is. (a) False (b) True
  38. 38.What does a fuse do? (a) is a resistance knob (b) smooths a wobbly supply (c) blows if current is high (d) makes things spin
  39. 39.What does a resistor do? (a) beeps for an alarm (b) makes things spin (c) makes a beeping sound (d) limits the current
  40. 40.True or false: a buzzer makes a beeping sound. (a) False (b) True

Answer key

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

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