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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 278 · 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.True or false: a capacitor blows if current is high. (a) True (b) False
  2. 2.What does a diode do? (a) lets current go one way (b) limits the current (c) senses how hot it is (d) makes a beeping sound
  3. 3.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  4. 4.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) transistor (d) thermistor
  5. 5.True or false: a thermistor senses how hot it is. (a) True (b) False
  6. 6.What does a transistor do? (a) limits the current (b) glows using little power (c) boosts a small signal (d) stores a little charge
  7. 7.What does a capacitor do? (a) glows using little power (b) beeps for an alarm (c) is a resistance knob (d) stores a little charge
  8. 8.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) thermistor (d) LDR
  9. 9.True or false: an LDR senses how bright it is. (a) True (b) False
  10. 10.True or false: an LDR turns a fan or wheels. (a) True (b) False
  11. 11.What does a thermistor do? (a) has coloured bands (b) glows using little power (c) senses how hot it is (d) is a resistance knob
  12. 12.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  13. 13.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  14. 14.🧩 Which component glows using little power? (a) transistor (b) LED (c) LDR (d) resistor
  15. 15.True or false: a motor turns a fan or wheels. (a) True (b) False
  16. 16.What does a resistor do? (a) turns a fan or wheels (b) has coloured bands (c) senses how bright it is (d) is a resistance knob
  17. 17.What does an LDR do? (a) smooths a wobbly supply (b) senses how hot it is (c) senses how bright it is (d) limits the current
  18. 18.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) has coloured bands (d) makes a beeping sound
  19. 19.True or false: a capacitor lets current go one way. (a) False (b) True
  20. 20.🧩 Which component limits the current? (a) thermistor (b) transistor (c) resistor (d) fuse
  21. 21.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) resistor (d) LED
  22. 22.What does an LED do? (a) makes a beeping sound (b) is a resistance knob (c) senses how hot it is (d) glows using little power
  23. 23.True or false: a resistor limits the current. (a) False (b) True
  24. 24.🧩 Which component is a resistance knob? (a) resistor (b) thermistor (c) transistor (d) potentiometer
  25. 25.🧩 Which component lets current go one way? (a) LED (b) diode (c) thermistor (d) buzzer
  26. 26.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) motor (d) LDR
  27. 27.🧩 Which component stores a little charge? (a) LED (b) buzzer (c) capacitor (d) transistor
  28. 28.What does a potentiometer do? (a) beeps for an alarm (b) is a resistance knob (c) has coloured bands (d) senses how hot it is
  29. 29.True or false: a transistor boosts a small signal. (a) True (b) False
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) LED (d) motor
  32. 32.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) resistor (d) motor
  33. 33.True or false: a buzzer stores a little charge. (a) False (b) True
  34. 34.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) diode (d) buzzer
  35. 35.True or false: a diode makes things spin. (a) True (b) False
  36. 36.True or false: an LED makes things spin. (a) True (b) False
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.True or false: a thermistor senses how bright it is. (a) True (b) False
  39. 39.What does a capacitor do? (a) lets current go one way (b) makes things spin (c) senses how bright it is (d) smooths a wobbly supply
  40. 40.True or false: a diode smooths a wobbly supply. (a) False (b) True

Answer key

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

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