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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 638 · 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 blows if current is high? (a) capacitor (b) potentiometer (c) diode (d) fuse
  2. 2.What does a thermistor do? (a) makes a beeping sound (b) senses how hot it is (c) has coloured bands (d) smooths a wobbly supply
  3. 3.True or false: an LED glows using little power. (a) True (b) False
  4. 4.🧩 Which component lets current go one way? (a) fuse (b) LED (c) LDR (d) diode
  5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  8. 8.True or false: a motor turns a fan or wheels. (a) True (b) False
  9. 9.🧩 Which component makes things spin? (a) capacitor (b) transistor (c) motor (d) resistor
  10. 10.What does a resistor do? (a) boosts a small signal (b) stores a little charge (c) limits the current (d) glows using little power
  11. 11.What does a diode do? (a) stores a little charge (b) has coloured bands (c) beeps for an alarm (d) lets current go one way
  12. 12.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) stores a little charge (d) beeps for an alarm
  13. 13.What does a buzzer do? (a) limits the current (b) has coloured bands (c) makes things spin (d) makes a beeping sound
  14. 14.🧩 Which component boosts a small signal? (a) transistor (b) thermistor (c) buzzer (d) LDR
  15. 15.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) potentiometer (d) transistor
  16. 16.True or false: a potentiometer boosts a small signal. (a) True (b) False
  17. 17.True or false: a transistor boosts a small signal. (a) True (b) False
  18. 18.True or false: a resistor has coloured bands. (a) True (b) False
  19. 19.🧩 Which component beeps for an alarm? (a) resistor (b) fuse (c) thermistor (d) buzzer
  20. 20.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) glows using little power (d) turns a fan or wheels
  21. 21.What does a resistor do? (a) is a resistance knob (b) senses how hot it is (c) has coloured bands (d) stores a little charge
  22. 22.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) potentiometer (d) LDR
  23. 23.🧩 Which component has coloured bands? (a) LED (b) resistor (c) thermistor (d) capacitor
  24. 24.True or false: a diode makes a beeping sound. (a) True (b) False
  25. 25.True or false: an LED has coloured bands. (a) True (b) False
  26. 26.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) senses how hot it is (d) boosts a small signal
  27. 27.True or false: a capacitor makes a beeping sound. (a) False (b) True
  28. 28.🧩 Which component limits the current? (a) thermistor (b) motor (c) capacitor (d) resistor
  29. 29.🧩 Which component glows using little power? (a) LED (b) thermistor (c) LDR (d) fuse
  30. 30.🧩 Which component turns a fan or wheels? (a) resistor (b) thermistor (c) motor (d) capacitor
  31. 31.True or false: a capacitor stores a little charge. (a) False (b) True
  32. 32.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) capacitor (d) LDR
  33. 33.True or false: a fuse blows if current is high. (a) True (b) False
  34. 34.What does a transistor do? (a) glows using little power (b) has coloured bands (c) smooths a wobbly supply (d) boosts a small signal
  35. 35.🧩 Which component is a resistance knob? (a) potentiometer (b) motor (c) LED (d) buzzer
  36. 36.🧩 Which component senses how bright it is? (a) buzzer (b) LED (c) LDR (d) diode
  37. 37.True or false: a fuse makes things spin. (a) True (b) False
  38. 38.True or false: a potentiometer senses how bright it is. (a) True (b) False
  39. 39.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) makes a beeping sound (d) has coloured bands
  40. 40.True or false: a potentiometer glows using little power. (a) True (b) False

Answer key

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

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