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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 363 · 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 blows if current is high? (a) LDR (b) buzzer (c) diode (d) fuse
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  4. 4.What does a motor do? (a) is a resistance knob (b) beeps for an alarm (c) turns a fan or wheels (d) glows using little power
  5. 5.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) stores a little charge (d) senses how hot it is
  6. 6.True or false: a fuse blows if current is high. (a) True (b) False
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  8. 8.True or false: a thermistor senses how bright it is. (a) True (b) False
  9. 9.True or false: a resistor limits the current. (a) True (b) False
  10. 10.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) transistor (d) LDR
  11. 11.🧩 Which component makes a beeping sound? (a) transistor (b) potentiometer (c) diode (d) buzzer
  12. 12.What does a capacitor do? (a) stores a little charge (b) blows if current is high (c) limits the current (d) is a resistance knob
  13. 13.What does a potentiometer do? (a) has coloured bands (b) makes a beeping sound (c) is a resistance knob (d) senses how bright it is
  14. 14.🧩 Which component smooths a wobbly supply? (a) diode (b) transistor (c) potentiometer (d) capacitor
  15. 15.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) beeps for an alarm (d) blows if current is high
  16. 16.🧩 Which component beeps for an alarm? (a) thermistor (b) motor (c) buzzer (d) transistor
  17. 17.🧩 Which component has coloured bands? (a) resistor (b) diode (c) LDR (d) motor
  18. 18.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) senses how bright it is (d) limits the current
  19. 19.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) potentiometer (d) resistor
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.🧩 Which component is a resistance knob? (a) potentiometer (b) LED (c) resistor (d) fuse
  22. 22.What does a resistor do? (a) blows if current is high (b) limits the current (c) beeps for an alarm (d) turns a fan or wheels
  23. 23.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) capacitor (d) thermistor
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  25. 25.True or false: a capacitor stores a little charge. (a) True (b) False
  26. 26.What does an LED do? (a) limits the current (b) glows using little power (c) senses how bright it is (d) is a resistance knob
  27. 27.What does a motor do? (a) boosts a small signal (b) makes a beeping sound (c) makes things spin (d) smooths a wobbly supply
  28. 28.What does a capacitor do? (a) blows if current is high (b) boosts a small signal (c) smooths a wobbly supply (d) senses how hot it is
  29. 29.True or false: a diode lets current go one way. (a) False (b) True
  30. 30.True or false: a capacitor is a resistance knob. (a) True (b) False
  31. 31.True or false: a thermistor senses how hot it is. (a) False (b) True
  32. 32.True or false: a transistor is a resistance knob. (a) False (b) True
  33. 33.True or false: a motor boosts a small signal. (a) False (b) True
  34. 34.True or false: a capacitor limits the current. (a) True (b) False
  35. 35.🧩 Which component glows using little power? (a) diode (b) capacitor (c) LED (d) LDR
  36. 36.True or false: a diode has coloured bands. (a) False (b) True
  37. 37.True or false: a potentiometer lets current go one way. (a) True (b) False
  38. 38.True or false: a resistor has coloured bands. (a) False (b) True
  39. 39.True or false: a diode beeps for an alarm. (a) True (b) False
  40. 40.What does a thermistor do? (a) limits the current (b) senses how bright it is (c) boosts a small signal (d) senses how hot it is

Answer key

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

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