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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 320 · 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: an LDR limits the current. (a) True (b) False
  2. 2.🧩 Which component senses how bright it is? (a) transistor (b) capacitor (c) fuse (d) LDR
  3. 3.True or false: a diode limits the current. (a) False (b) True
  4. 4.🧩 Which component smooths a wobbly supply? (a) LED (b) motor (c) capacitor (d) transistor
  5. 5.What does a buzzer do? (a) makes a beeping sound (b) glows using little power (c) makes things spin (d) senses how bright it is
  6. 6.🧩 Which component boosts a small signal? (a) potentiometer (b) motor (c) transistor (d) LDR
  7. 7.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  9. 9.🧩 Which component makes things spin? (a) motor (b) LED (c) diode (d) buzzer
  10. 10.True or false: an LDR stores a little charge. (a) True (b) False
  11. 11.True or false: a motor turns a fan or wheels. (a) True (b) False
  12. 12.True or false: a transistor limits the current. (a) True (b) False
  13. 13.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) LDR (d) LED
  14. 14.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  15. 15.What does a thermistor do? (a) beeps for an alarm (b) turns a fan or wheels (c) makes things spin (d) senses how hot it is
  16. 16.🧩 Which component stores a little charge? (a) LDR (b) diode (c) capacitor (d) motor
  17. 17.What does a diode do? (a) limits the current (b) turns a fan or wheels (c) lets current go one way (d) glows using little power
  18. 18.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  19. 19.🧩 Which component limits the current? (a) motor (b) resistor (c) fuse (d) potentiometer
  20. 20.What does a motor do? (a) beeps for an alarm (b) boosts a small signal (c) turns a fan or wheels (d) is a resistance knob
  21. 21.What does a capacitor do? (a) beeps for an alarm (b) is a resistance knob (c) glows using little power (d) smooths a wobbly supply
  22. 22.🧩 Which component lets current go one way? (a) capacitor (b) LDR (c) diode (d) fuse
  23. 23.What does an LDR do? (a) limits the current (b) senses how bright it is (c) lets current go one way (d) is a resistance knob
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  25. 25.What does a transistor do? (a) lets current go one way (b) boosts a small signal (c) beeps for an alarm (d) stores a little charge
  26. 26.True or false: a diode makes a beeping sound. (a) False (b) True
  27. 27.True or false: a buzzer beeps for an alarm. (a) True (b) False
  28. 28.True or false: a motor senses how hot it is. (a) True (b) False
  29. 29.What does a capacitor do? (a) limits the current (b) boosts a small signal (c) glows using little power (d) stores a little charge
  30. 30.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) resistor (d) motor
  31. 31.True or false: a potentiometer senses how hot it is. (a) False (b) True
  32. 32.What does an LED do? (a) makes things spin (b) smooths a wobbly supply (c) beeps for an alarm (d) glows using little power
  33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
  34. 34.What does a potentiometer do? (a) limits the current (b) lets current go one way (c) makes a beeping sound (d) is a resistance knob
  35. 35.True or false: a capacitor glows using little power. (a) True (b) False
  36. 36.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) LDR (d) thermistor
  37. 37.True or false: a resistor limits the current. (a) True (b) False
  38. 38.True or false: a thermistor is a resistance knob. (a) False (b) True
  39. 39.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) potentiometer (d) diode
  40. 40.🧩 Which component blows if current is high? (a) resistor (b) thermistor (c) transistor (d) fuse

Answer key

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

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