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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 324 · 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) is a resistance knob (b) blows if current is high (c) glows using little power (d) boosts a small signal
  2. 2.🧩 Which component makes things spin? (a) potentiometer (b) thermistor (c) motor (d) buzzer
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  4. 4.What does a motor do? (a) has coloured bands (b) blows if current is high (c) is a resistance knob (d) turns a fan or wheels
  5. 5.True or false: a motor glows using little power. (a) True (b) False
  6. 6.True or false: a potentiometer glows using little power. (a) True (b) False
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  8. 8.What does a thermistor do? (a) senses how bright it is (b) limits the current (c) smooths a wobbly supply (d) senses how hot it is
  9. 9.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  10. 10.True or false: a motor turns a fan or wheels. (a) False (b) True
  11. 11.What does a fuse do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) makes things spin
  12. 12.What does an LDR do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) stores a little charge (d) senses how bright it is
  13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  14. 14.🧩 Which component blows if current is high? (a) LDR (b) potentiometer (c) diode (d) fuse
  15. 15.True or false: an LED glows using little power. (a) True (b) False
  16. 16.What does a diode do? (a) beeps for an alarm (b) makes a beeping sound (c) lets current go one way (d) limits the current
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) lets current go one way (d) senses how hot it is
  19. 19.🧩 Which component lets current go one way? (a) resistor (b) diode (c) capacitor (d) thermistor
  20. 20.True or false: a motor makes things spin. (a) True (b) False
  21. 21.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  22. 22.🧩 Which component has coloured bands? (a) motor (b) LED (c) fuse (d) resistor
  23. 23.What does a resistor do? (a) makes things spin (b) makes a beeping sound (c) limits the current (d) glows using little power
  24. 24.True or false: a transistor boosts a small signal. (a) True (b) False
  25. 25.What does a resistor do? (a) senses how bright it is (b) makes a beeping sound (c) makes things spin (d) has coloured bands
  26. 26.True or false: an LED beeps for an alarm. (a) True (b) False
  27. 27.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  28. 28.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) diode (d) thermistor
  29. 29.True or false: a motor senses how bright it is. (a) True (b) False
  30. 30.🧩 Which component senses how bright it is? (a) thermistor (b) resistor (c) capacitor (d) LDR
  31. 31.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) buzzer (d) diode
  32. 32.True or false: a potentiometer makes things spin. (a) True (b) False
  33. 33.True or false: a capacitor lets current go one way. (a) True (b) False
  34. 34.True or false: a fuse turns a fan or wheels. (a) False (b) True
  35. 35.True or false: a thermistor is a resistance knob. (a) True (b) False
  36. 36.🧩 Which component limits the current? (a) resistor (b) thermistor (c) LED (d) buzzer
  37. 37.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) resistor (d) LED
  38. 38.True or false: a potentiometer is a resistance knob. (a) False (b) True
  39. 39.🧩 Which component boosts a small signal? (a) capacitor (b) motor (c) thermistor (d) transistor
  40. 40.True or false: a capacitor blows if current is high. (a) False (b) True

Answer key

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

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