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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 205 · 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 is a resistance knob? (a) LDR (b) diode (c) resistor (d) potentiometer
  2. 2.🧩 Which component makes things spin? (a) LDR (b) motor (c) capacitor (d) resistor
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  4. 4.What does a diode do? (a) glows using little power (b) senses how hot it is (c) beeps for an alarm (d) lets current go one way
  5. 5.True or false: a transistor boosts a small signal. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) capacitor (b) buzzer (c) resistor (d) motor
  7. 7.🧩 Which component senses how bright it is? (a) LDR (b) thermistor (c) motor (d) resistor
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  9. 9.True or false: a resistor has coloured bands. (a) True (b) False
  10. 10.🧩 Which component makes a beeping sound? (a) LED (b) motor (c) buzzer (d) potentiometer
  11. 11.True or false: a transistor lets current go one way. (a) False (b) True
  12. 12.True or false: an LED senses how bright it is. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  14. 14.🧩 Which component glows using little power? (a) resistor (b) transistor (c) fuse (d) LED
  15. 15.What does a fuse do? (a) beeps for an alarm (b) glows using little power (c) makes things spin (d) blows if current is high
  16. 16.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) resistor (d) transistor
  17. 17.🧩 Which component beeps for an alarm? (a) LDR (b) LED (c) buzzer (d) diode
  18. 18.🧩 Which component senses how hot it is? (a) LED (b) potentiometer (c) transistor (d) thermistor
  19. 19.True or false: a diode lets current go one way. (a) True (b) False
  20. 20.What does a buzzer do? (a) has coloured bands (b) boosts a small signal (c) glows using little power (d) beeps for an alarm
  21. 21.What does an LED do? (a) glows using little power (b) has coloured bands (c) turns a fan or wheels (d) is a resistance knob
  22. 22.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) thermistor (d) buzzer
  23. 23.True or false: a potentiometer is a resistance knob. (a) False (b) True
  24. 24.🧩 Which component lets current go one way? (a) resistor (b) potentiometer (c) capacitor (d) diode
  25. 25.True or false: a buzzer senses how hot it is. (a) True (b) False
  26. 26.True or false: a thermistor senses how hot it is. (a) False (b) True
  27. 27.True or false: a fuse blows if current is high. (a) False (b) True
  28. 28.True or false: a capacitor blows if current is high. (a) True (b) False
  29. 29.What does a potentiometer do? (a) makes a beeping sound (b) limits the current (c) makes things spin (d) is a resistance knob
  30. 30.What does a capacitor do? (a) lets current go one way (b) limits the current (c) glows using little power (d) stores a little charge
  31. 31.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  32. 32.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) potentiometer (d) resistor
  33. 33.True or false: a capacitor boosts a small signal. (a) False (b) True
  34. 34.True or false: a buzzer lets current go one way. (a) True (b) False
  35. 35.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) blows if current is high (d) stores a little charge
  36. 36.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) thermistor (d) fuse
  37. 37.True or false: a resistor is a resistance knob. (a) False (b) True
  38. 38.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) turns a fan or wheels
  39. 39.True or false: a potentiometer lets current go one way. (a) False (b) True
  40. 40.What does an LDR do? (a) stores a little charge (b) senses how bright it is (c) makes a beeping sound (d) smooths a wobbly supply

Answer key

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

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