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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 144 · 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 a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) makes things spin (d) beeps for an alarm
  2. 2.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) glows using little power (d) smooths a wobbly supply
  3. 3.🧩 Which component glows using little power? (a) buzzer (b) LED (c) LDR (d) motor
  4. 4.True or false: a buzzer beeps for an alarm. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  7. 7.🧩 Which component is a resistance knob? (a) LED (b) buzzer (c) potentiometer (d) diode
  8. 8.True or false: a thermistor senses how hot it is. (a) False (b) True
  9. 9.What does a thermistor do? (a) limits the current (b) turns a fan or wheels (c) senses how hot it is (d) makes things spin
  10. 10.What does an LED do? (a) blows if current is high (b) glows using little power (c) has coloured bands (d) beeps for an alarm
  11. 11.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) buzzer (d) LED
  12. 12.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) resistor (d) buzzer
  13. 13.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  14. 14.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) thermistor (d) capacitor
  15. 15.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) beeps for an alarm (d) makes a beeping sound
  16. 16.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) motor (d) LDR
  17. 17.True or false: a buzzer glows using little power. (a) False (b) True
  18. 18.What does a fuse do? (a) stores a little charge (b) blows if current is high (c) beeps for an alarm (d) boosts a small signal
  19. 19.True or false: a capacitor stores a little charge. (a) False (b) True
  20. 20.What does a capacitor do? (a) stores a little charge (b) senses how hot it is (c) limits the current (d) glows using little power
  21. 21.What does a resistor do? (a) blows if current is high (b) senses how hot it is (c) limits the current (d) turns a fan or wheels
  22. 22.True or false: a buzzer senses how bright it is. (a) False (b) True
  23. 23.True or false: a thermistor has coloured bands. (a) False (b) True
  24. 24.True or false: an LED blows if current is high. (a) False (b) True
  25. 25.True or false: an LDR has coloured bands. (a) True (b) False
  26. 26.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) transistor (d) diode
  27. 27.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) LED (d) transistor
  28. 28.🧩 Which component makes things spin? (a) LED (b) capacitor (c) resistor (d) motor
  29. 29.🧩 Which component makes a beeping sound? (a) transistor (b) motor (c) buzzer (d) LED
  30. 30.True or false: a resistor limits the current. (a) True (b) False
  31. 31.🧩 Which component senses how bright it is? (a) LDR (b) transistor (c) resistor (d) buzzer
  32. 32.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) motor (d) potentiometer
  33. 33.True or false: a motor limits the current. (a) False (b) True
  34. 34.True or false: a motor glows using little power. (a) True (b) False
  35. 35.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) capacitor (d) LDR
  36. 36.What does an LDR do? (a) has coloured bands (b) makes a beeping sound (c) turns a fan or wheels (d) senses how bright it is
  37. 37.True or false: an LDR senses how bright it is. (a) True (b) False
  38. 38.True or false: a potentiometer is a resistance knob. (a) False (b) True
  39. 39.True or false: a resistor turns a fan or wheels. (a) False (b) True
  40. 40.True or false: a motor boosts a small signal. (a) False (b) True

Answer key

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

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