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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 700 · 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 part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  2. 2.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) capacitor (d) potentiometer
  3. 3.What does a thermistor do? (a) turns a fan or wheels (b) blows if current is high (c) limits the current (d) senses how hot it is
  4. 4.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  6. 6.True or false: a buzzer beeps for an alarm. (a) False (b) True
  7. 7.🧩 Which component is a resistance knob? (a) transistor (b) motor (c) potentiometer (d) LED
  8. 8.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) transistor (d) buzzer
  9. 9.What does a fuse do? (a) turns a fan or wheels (b) blows if current is high (c) makes things spin (d) lets current go one way
  10. 10.True or false: a fuse senses how bright it is. (a) False (b) True
  11. 11.What does an LED do? (a) senses how hot it is (b) glows using little power (c) makes a beeping sound (d) stores a little charge
  12. 12.What does a resistor do? (a) glows using little power (b) makes a beeping sound (c) smooths a wobbly supply (d) limits the current
  13. 13.🧩 Which component glows using little power? (a) capacitor (b) LED (c) buzzer (d) motor
  14. 14.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  15. 15.True or false: a diode lets current go one way. (a) True (b) False
  16. 16.What does an LDR do? (a) turns a fan or wheels (b) makes things spin (c) senses how bright it is (d) is a resistance knob
  17. 17.True or false: a capacitor stores a little charge. (a) True (b) False
  18. 18.What does a potentiometer do? (a) senses how hot it is (b) glows using little power (c) is a resistance knob (d) smooths a wobbly supply
  19. 19.What does a transistor do? (a) senses how hot it is (b) blows if current is high (c) stores a little charge (d) boosts a small signal
  20. 20.🧩 Which component makes things spin? (a) capacitor (b) LED (c) buzzer (d) motor
  21. 21.True or false: an LDR senses how bright it is. (a) False (b) True
  22. 22.What does a diode do? (a) stores a little charge (b) lets current go one way (c) boosts a small signal (d) smooths a wobbly supply
  23. 23.What does a resistor do? (a) beeps for an alarm (b) has coloured bands (c) senses how hot it is (d) makes a beeping sound
  24. 24.🧩 Which component limits the current? (a) potentiometer (b) transistor (c) resistor (d) thermistor
  25. 25.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) is a resistance knob (d) smooths a wobbly supply
  26. 26.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
  27. 27.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) senses how hot it is (d) senses how bright it is
  28. 28.True or false: a thermistor is a resistance knob. (a) False (b) True
  29. 29.🧩 Which component senses how bright it is? (a) motor (b) capacitor (c) LED (d) LDR
  30. 30.🧩 Which component stores a little charge? (a) transistor (b) thermistor (c) diode (d) capacitor
  31. 31.True or false: a diode stores a little charge. (a) False (b) True
  32. 32.True or false: a resistor limits the current. (a) False (b) True
  33. 33.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) buzzer (d) LDR
  34. 34.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) diode (d) transistor
  35. 35.True or false: a thermistor senses how hot it is. (a) True (b) False
  36. 36.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) thermistor (d) LDR
  37. 37.True or false: a potentiometer lets current go one way. (a) False (b) True
  38. 38.True or false: an LDR limits the current. (a) True (b) False
  39. 39.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) diode (d) buzzer
  40. 40.True or false: a fuse makes a beeping sound. (a) True (b) False

Answer key

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

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