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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 71 · 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 component smooths a wobbly supply? (a) LED (b) diode (c) potentiometer (d) capacitor
  2. 2.🧩 Which component glows using little power? (a) diode (b) thermistor (c) motor (d) LED
  3. 3.True or false: a thermistor makes things spin. (a) True (b) False
  4. 4.What does an LED do? (a) glows using little power (b) stores a little charge (c) senses how bright it is (d) beeps for an alarm
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  7. 7.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) motor (d) capacitor
  8. 8.What does a diode do? (a) lets current go one way (b) has coloured bands (c) makes things spin (d) blows if current is high
  9. 9.What does a potentiometer do? (a) is a resistance knob (b) smooths a wobbly supply (c) senses how hot it is (d) makes a beeping sound
  10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  11. 11.True or false: a thermistor senses how hot it is. (a) False (b) True
  12. 12.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) LDR (d) resistor
  13. 13.🧩 Which component lets current go one way? (a) motor (b) transistor (c) LED (d) diode
  14. 14.True or false: a resistor has coloured bands. (a) True (b) False
  15. 15.True or false: a capacitor stores a little charge. (a) True (b) False
  16. 16.True or false: a transistor beeps for an alarm. (a) False (b) True
  17. 17.True or false: an LED glows using little power. (a) False (b) True
  18. 18.True or false: a capacitor beeps for an alarm. (a) True (b) False
  19. 19.True or false: a buzzer makes things spin. (a) False (b) True
  20. 20.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) blows if current is high (d) stores a little charge
  21. 21.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  22. 22.True or false: a motor smooths a wobbly supply. (a) True (b) False
  23. 23.True or false: a potentiometer is a resistance knob. (a) True (b) False
  24. 24.What does a transistor do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) boosts a small signal
  25. 25.🧩 Which component stores a little charge? (a) potentiometer (b) LED (c) capacitor (d) motor
  26. 26.What does an LDR do? (a) is a resistance knob (b) limits the current (c) senses how bright it is (d) makes things spin
  27. 27.What does a thermistor do? (a) stores a little charge (b) has coloured bands (c) is a resistance knob (d) senses how hot it is
  28. 28.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) fuse (d) LED
  29. 29.What does a fuse do? (a) blows if current is high (b) glows using little power (c) beeps for an alarm (d) limits the current
  30. 30.True or false: a transistor has coloured bands. (a) False (b) True
  31. 31.What does a motor do? (a) turns a fan or wheels (b) limits the current (c) blows if current is high (d) lets current go one way
  32. 32.True or false: a resistor limits the current. (a) False (b) True
  33. 33.🧩 Which component is a resistance knob? (a) fuse (b) thermistor (c) potentiometer (d) transistor
  34. 34.🧩 Which component turns a fan or wheels? (a) potentiometer (b) transistor (c) fuse (d) motor
  35. 35.True or false: a motor senses how hot it is. (a) True (b) False
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  37. 37.True or false: a potentiometer blows if current is high. (a) True (b) False
  38. 38.What does a motor do? (a) makes things spin (b) lets current go one way (c) is a resistance knob (d) stores a little charge
  39. 39.True or false: a buzzer beeps for an alarm. (a) True (b) False
  40. 40.True or false: a buzzer boosts a small signal. (a) False (b) True

Answer key

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

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