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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 711 · 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 stores a little charge? (a) fuse (b) potentiometer (c) motor (d) capacitor
  2. 2.What does a capacitor do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) limits the current
  3. 3.🧩 Which component limits the current? (a) diode (b) capacitor (c) thermistor (d) resistor
  4. 4.What does a transistor do? (a) limits the current (b) boosts a small signal (c) glows using little power (d) makes a beeping sound
  5. 5.True or false: a buzzer beeps for an alarm. (a) False (b) True
  6. 6.🧩 Which component makes a beeping sound? (a) diode (b) fuse (c) capacitor (d) buzzer
  7. 7.🧩 Which component glows using little power? (a) LED (b) potentiometer (c) resistor (d) thermistor
  8. 8.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) potentiometer (d) buzzer
  9. 9.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  10. 10.🧩 Which component lets current go one way? (a) capacitor (b) LED (c) LDR (d) diode
  11. 11.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) LDR (d) LED
  12. 12.True or false: a resistor has coloured bands. (a) True (b) False
  13. 13.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  14. 14.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  15. 15.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) diode (d) transistor
  16. 16.True or false: a buzzer makes a beeping sound. (a) False (b) True
  17. 17.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) makes things spin (d) turns a fan or wheels
  18. 18.🧩 Which component makes things spin? (a) transistor (b) capacitor (c) fuse (d) motor
  19. 19.What does a capacitor do? (a) lets current go one way (b) beeps for an alarm (c) makes a beeping sound (d) smooths a wobbly supply
  20. 20.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) transistor (d) capacitor
  21. 21.What does an LDR do? (a) limits the current (b) boosts a small signal (c) makes things spin (d) senses how bright it is
  22. 22.What does a resistor do? (a) senses how bright it is (b) stores a little charge (c) glows using little power (d) limits the current
  23. 23.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) potentiometer (d) capacitor
  24. 24.True or false: a resistor stores a little charge. (a) True (b) False
  25. 25.True or false: a thermistor beeps for an alarm. (a) False (b) True
  26. 26.True or false: a capacitor stores a little charge. (a) False (b) True
  27. 27.What does a motor do? (a) has coloured bands (b) smooths a wobbly supply (c) turns a fan or wheels (d) makes a beeping sound
  28. 28.True or false: a thermistor senses how hot it is. (a) True (b) False
  29. 29.What does an LED do? (a) smooths a wobbly supply (b) limits the current (c) beeps for an alarm (d) glows using little power
  30. 30.What does a thermistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how hot it is (d) turns a fan or wheels
  31. 31.True or false: a motor turns a fan or wheels. (a) True (b) False
  32. 32.True or false: a potentiometer glows using little power. (a) False (b) True
  33. 33.True or false: a potentiometer is a resistance knob. (a) True (b) False
  34. 34.True or false: a transistor boosts a small signal. (a) True (b) False
  35. 35.True or false: a buzzer boosts a small signal. (a) True (b) False
  36. 36.What does a diode do? (a) boosts a small signal (b) lets current go one way (c) is a resistance knob (d) senses how bright it is
  37. 37.True or false: an LDR makes a beeping sound. (a) False (b) True
  38. 38.🧩 Which component has coloured bands? (a) thermistor (b) buzzer (c) resistor (d) LED
  39. 39.True or false: a capacitor is a resistance knob. (a) False (b) True
  40. 40.What does a resistor do? (a) senses how bright it is (b) beeps for an alarm (c) senses how hot it is (d) has coloured bands

Answer key

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

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