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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 98 · 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 an LDR do? (a) glows using little power (b) senses how hot it is (c) makes a beeping sound (d) senses how bright it is
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  3. 3.🧩 Which component blows if current is high? (a) transistor (b) buzzer (c) fuse (d) thermistor
  4. 4.What does a buzzer do? (a) glows using little power (b) senses how hot it is (c) is a resistance knob (d) makes a beeping sound
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  6. 6.🧩 Which component turns a fan or wheels? (a) diode (b) LDR (c) thermistor (d) motor
  7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
  8. 8.True or false: a buzzer is a resistance knob. (a) False (b) True
  9. 9.What does a diode do? (a) blows if current is high (b) limits the current (c) boosts a small signal (d) lets current go one way
  10. 10.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) buzzer (d) resistor
  11. 11.What does a motor do? (a) lets current go one way (b) makes things spin (c) blows if current is high (d) senses how hot it is
  12. 12.True or false: a resistor blows if current is high. (a) False (b) True
  13. 13.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes things spin (d) boosts a small signal
  14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
  15. 15.🧩 Which component lets current go one way? (a) diode (b) LDR (c) resistor (d) capacitor
  16. 16.What does a capacitor do? (a) blows if current is high (b) is a resistance knob (c) turns a fan or wheels (d) stores a little charge
  17. 17.🧩 Which component senses how bright it is? (a) potentiometer (b) LDR (c) thermistor (d) motor
  18. 18.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) makes a beeping sound (d) turns a fan or wheels
  19. 19.🧩 Which component has coloured bands? (a) LED (b) resistor (c) buzzer (d) LDR
  20. 20.True or false: a resistor stores a little charge. (a) False (b) True
  21. 21.True or false: a diode lets current go one way. (a) False (b) True
  22. 22.What does an LED do? (a) makes a beeping sound (b) glows using little power (c) blows if current is high (d) stores a little charge
  23. 23.True or false: a fuse blows if current is high. (a) True (b) False
  24. 24.True or false: an LED glows using little power. (a) False (b) True
  25. 25.True or false: an LDR has coloured bands. (a) False (b) True
  26. 26.True or false: a resistor has coloured bands. (a) True (b) False
  27. 27.True or false: an LDR senses how bright it is. (a) False (b) True
  28. 28.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  30. 30.True or false: a motor beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  32. 32.🧩 Which component limits the current? (a) diode (b) resistor (c) potentiometer (d) transistor
  33. 33.What does a resistor do? (a) senses how hot it is (b) lets current go one way (c) limits the current (d) blows if current is high
  34. 34.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) makes a beeping sound (d) senses how bright it is
  35. 35.🧩 Which component makes a beeping sound? (a) motor (b) resistor (c) buzzer (d) potentiometer
  36. 36.True or false: an LDR limits the current. (a) False (b) True
  37. 37.🧩 Which component senses how hot it is? (a) resistor (b) transistor (c) diode (d) thermistor
  38. 38.What does a capacitor do? (a) senses how hot it is (b) boosts a small signal (c) turns a fan or wheels (d) smooths a wobbly supply
  39. 39.What does a thermistor do? (a) blows if current is high (b) has coloured bands (c) senses how hot it is (d) is a resistance knob
  40. 40.True or false: a thermistor stores a little charge. (a) True (b) False

Answer key

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

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