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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 137 · 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 LED do? (a) lets current go one way (b) has coloured bands (c) glows using little power (d) senses how bright it is
  2. 2.🧩 Which component has coloured bands? (a) fuse (b) potentiometer (c) resistor (d) motor
  3. 3.True or false: an LED has coloured bands. (a) True (b) False
  4. 4.True or false: a capacitor stores a little charge. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  7. 7.What does a capacitor do? (a) makes a beeping sound (b) blows if current is high (c) stores a little charge (d) boosts a small signal
  8. 8.What does a buzzer do? (a) has coloured bands (b) lets current go one way (c) makes a beeping sound (d) makes things spin
  9. 9.What does a resistor do? (a) makes a beeping sound (b) beeps for an alarm (c) senses how bright it is (d) has coloured bands
  10. 10.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) has coloured bands (d) turns a fan or wheels
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  12. 12.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) buzzer (d) LDR
  13. 13.True or false: a resistor has coloured bands. (a) True (b) False
  14. 14.What does a transistor do? (a) smooths a wobbly supply (b) has coloured bands (c) boosts a small signal (d) makes things spin
  15. 15.🧩 Which component boosts a small signal? (a) resistor (b) motor (c) transistor (d) capacitor
  16. 16.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) fuse (d) transistor
  17. 17.True or false: a thermistor blows if current is high. (a) False (b) True
  18. 18.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  19. 19.🧩 Which component glows using little power? (a) fuse (b) thermistor (c) LED (d) diode
  20. 20.🧩 Which component limits the current? (a) buzzer (b) fuse (c) capacitor (d) resistor
  21. 21.True or false: a diode lets current go one way. (a) True (b) False
  22. 22.What does a thermistor do? (a) limits the current (b) makes a beeping sound (c) senses how hot it is (d) stores a little charge
  23. 23.True or false: a buzzer boosts a small signal. (a) False (b) True
  24. 24.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) buzzer (d) transistor
  25. 25.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) potentiometer (d) buzzer
  26. 26.What does an LDR do? (a) stores a little charge (b) smooths a wobbly supply (c) turns a fan or wheels (d) senses how bright it is
  27. 27.True or false: a transistor boosts a small signal. (a) False (b) True
  28. 28.What does a motor do? (a) turns a fan or wheels (b) limits the current (c) senses how bright it is (d) is a resistance knob
  29. 29.True or false: a transistor beeps for an alarm. (a) True (b) False
  30. 30.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) capacitor (d) motor
  31. 31.What does a diode do? (a) has coloured bands (b) is a resistance knob (c) blows if current is high (d) lets current go one way
  32. 32.True or false: a capacitor makes things spin. (a) False (b) True
  33. 33.What does a buzzer do? (a) glows using little power (b) lets current go one way (c) stores a little charge (d) beeps for an alarm
  34. 34.What does a resistor do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) makes a beeping sound
  35. 35.True or false: a resistor beeps for an alarm. (a) False (b) True
  36. 36.True or false: a fuse blows if current is high. (a) True (b) False
  37. 37.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) potentiometer (d) motor
  38. 38.🧩 Which component lets current go one way? (a) resistor (b) transistor (c) fuse (d) diode
  39. 39.True or false: a diode smooths a wobbly supply. (a) False (b) True
  40. 40.True or false: a motor beeps for an alarm. (a) False (b) True

Answer key

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

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