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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 553 · 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) fuse (b) potentiometer (c) buzzer (d) capacitor
  2. 2.True or false: a capacitor beeps for an alarm. (a) True (b) False
  3. 3.True or false: a potentiometer is a resistance knob. (a) True (b) False
  4. 4.True or false: a thermistor blows if current is high. (a) False (b) True
  5. 5.🧩 Which component is a resistance knob? (a) motor (b) potentiometer (c) capacitor (d) transistor
  6. 6.🧩 Which component boosts a small signal? (a) diode (b) LED (c) capacitor (d) transistor
  7. 7.True or false: a thermistor senses how hot it is. (a) False (b) True
  8. 8.What does a thermistor do? (a) senses how hot it is (b) senses how bright it is (c) glows using little power (d) blows if current is high
  9. 9.What does a transistor do? (a) is a resistance knob (b) glows using little power (c) limits the current (d) boosts a small signal
  10. 10.True or false: a fuse boosts a small signal. (a) False (b) True
  11. 11.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) stores a little charge (d) senses how bright it is
  12. 12.True or false: a motor turns a fan or wheels. (a) True (b) False
  13. 13.What does an LDR do? (a) blows if current is high (b) has coloured bands (c) is a resistance knob (d) senses how bright it is
  14. 14.What does an LED do? (a) turns a fan or wheels (b) has coloured bands (c) glows using little power (d) stores a little charge
  15. 15.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) is a resistance knob (d) limits the current
  16. 16.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  17. 17.True or false: a diode is a resistance knob. (a) False (b) True
  18. 18.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) potentiometer (d) resistor
  19. 19.True or false: a capacitor lets current go one way. (a) True (b) False
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.True or false: a buzzer beeps for an alarm. (a) False (b) True
  22. 22.🧩 Which component has coloured bands? (a) capacitor (b) motor (c) LDR (d) resistor
  23. 23.🧩 Which component limits the current? (a) resistor (b) LDR (c) motor (d) fuse
  24. 24.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  25. 25.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  26. 26.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) motor (d) potentiometer
  27. 27.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) motor (d) LED
  28. 28.True or false: a transistor boosts a small signal. (a) False (b) True
  29. 29.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) LDR (d) buzzer
  30. 30.True or false: an LDR beeps for an alarm. (a) False (b) True
  31. 31.True or false: an LED has coloured bands. (a) False (b) True
  32. 32.True or false: a resistor limits the current. (a) True (b) False
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  34. 34.🧩 Which component glows using little power? (a) LED (b) thermistor (c) LDR (d) capacitor
  35. 35.🧩 Which component makes things spin? (a) LDR (b) motor (c) diode (d) potentiometer
  36. 36.True or false: a motor stores a little charge. (a) True (b) False
  37. 37.What does a buzzer do? (a) senses how hot it is (b) boosts a small signal (c) beeps for an alarm (d) has coloured bands
  38. 38.What does a fuse do? (a) senses how hot it is (b) has coloured bands (c) smooths a wobbly supply (d) blows if current is high
  39. 39.What does a potentiometer do? (a) limits the current (b) lets current go one way (c) stores a little charge (d) is a resistance knob
  40. 40.True or false: a fuse turns a fan or wheels. (a) True (b) False

Answer key

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

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