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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 633 · 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: a capacitor stores a little charge. (a) True (b) False
  2. 2.What does a transistor do? (a) senses how bright it is (b) is a resistance knob (c) limits the current (d) boosts a small signal
  3. 3.🧩 Which component blows if current is high? (a) LED (b) diode (c) capacitor (d) fuse
  4. 4.🧩 Which component glows using little power? (a) thermistor (b) motor (c) diode (d) LED
  5. 5.True or false: a transistor beeps for an alarm. (a) True (b) False
  6. 6.True or false: a diode limits the current. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  8. 8.🧩 Which component makes a beeping sound? (a) thermistor (b) resistor (c) capacitor (d) buzzer
  9. 9.True or false: a buzzer beeps for an alarm. (a) False (b) True
  10. 10.🧩 Which component lets current go one way? (a) transistor (b) LDR (c) capacitor (d) diode
  11. 11.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) glows using little power (d) lets current go one way
  12. 12.True or false: a transistor has coloured bands. (a) True (b) False
  13. 13.True or false: a thermistor blows if current is high. (a) False (b) True
  14. 14.🧩 Which component has coloured bands? (a) motor (b) LDR (c) potentiometer (d) resistor
  15. 15.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) makes things spin (d) has coloured bands
  16. 16.True or false: an LDR makes things spin. (a) False (b) True
  17. 17.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  18. 18.What does a potentiometer do? (a) has coloured bands (b) stores a little charge (c) is a resistance knob (d) makes a beeping sound
  19. 19.True or false: a thermistor boosts a small signal. (a) True (b) False
  20. 20.True or false: a transistor senses how hot it is. (a) False (b) True
  21. 21.True or false: a transistor boosts a small signal. (a) True (b) False
  22. 22.True or false: a motor is a resistance knob. (a) False (b) True
  23. 23.🧩 Which component stores a little charge? (a) resistor (b) fuse (c) capacitor (d) potentiometer
  24. 24.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  25. 25.True or false: an LDR stores a little charge. (a) True (b) False
  26. 26.True or false: a resistor has coloured bands. (a) True (b) False
  27. 27.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) is a resistance knob (d) turns a fan or wheels
  28. 28.True or false: an LDR senses how bright it is. (a) True (b) False
  29. 29.What does a capacitor do? (a) glows using little power (b) has coloured bands (c) senses how bright it is (d) smooths a wobbly supply
  30. 30.🧩 Which component senses how hot it is? (a) motor (b) potentiometer (c) LED (d) thermistor
  31. 31.True or false: a buzzer senses how hot it is. (a) False (b) True
  32. 32.🧩 Which component limits the current? (a) capacitor (b) potentiometer (c) resistor (d) motor
  33. 33.True or false: an LED glows using little power. (a) False (b) True
  34. 34.What does a diode do? (a) makes a beeping sound (b) lets current go one way (c) limits the current (d) blows if current is high
  35. 35.True or false: a potentiometer is a resistance knob. (a) False (b) True
  36. 36.True or false: a capacitor makes a beeping sound. (a) False (b) True
  37. 37.True or false: a diode glows using little power. (a) True (b) False
  38. 38.True or false: an LDR beeps for an alarm. (a) False (b) True
  39. 39.🧩 Which component senses how bright it is? (a) capacitor (b) fuse (c) LDR (d) transistor
  40. 40.True or false: a diode turns a fan or wheels. (a) False (b) True

Answer key

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

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