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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 68 · 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 buzzer makes a beeping sound. (a) False (b) True
  2. 2.🧩 Which component makes things spin? (a) transistor (b) fuse (c) buzzer (d) motor
  3. 3.🧩 Which component is a resistance knob? (a) fuse (b) resistor (c) potentiometer (d) transistor
  4. 4.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) thermistor (d) resistor
  5. 5.What does a transistor do? (a) senses how hot it is (b) beeps for an alarm (c) blows if current is high (d) boosts a small signal
  6. 6.True or false: a resistor has coloured bands. (a) True (b) False
  7. 7.What does a resistor do? (a) turns a fan or wheels (b) stores a little charge (c) boosts a small signal (d) limits the current
  8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  10. 10.True or false: a resistor stores a little charge. (a) True (b) False
  11. 11.🧩 Which component senses how hot it is? (a) resistor (b) fuse (c) diode (d) thermistor
  12. 12.🧩 Which component limits the current? (a) LDR (b) fuse (c) resistor (d) LED
  13. 13.True or false: an LDR senses how bright it is. (a) False (b) True
  14. 14.🧩 Which component makes a beeping sound? (a) motor (b) LED (c) resistor (d) buzzer
  15. 15.True or false: a capacitor limits the current. (a) True (b) False
  16. 16.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) resistor (d) LED
  17. 17.🧩 Which component glows using little power? (a) LED (b) buzzer (c) thermistor (d) LDR
  18. 18.True or false: a capacitor blows if current is high. (a) True (b) False
  19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  20. 20.What does an LED do? (a) makes things spin (b) is a resistance knob (c) lets current go one way (d) glows using little power
  21. 21.True or false: a capacitor is a resistance knob. (a) False (b) True
  22. 22.What does an LDR do? (a) limits the current (b) makes a beeping sound (c) glows using little power (d) senses how bright it is
  23. 23.What does a buzzer do? (a) turns a fan or wheels (b) senses how hot it is (c) senses how bright it is (d) makes a beeping sound
  24. 24.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) has coloured bands (d) boosts a small signal
  25. 25.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) stores a little charge (d) limits the current
  26. 26.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) resistor (d) buzzer
  27. 27.What does a capacitor do? (a) senses how hot it is (b) lets current go one way (c) stores a little charge (d) blows if current is high
  28. 28.What does a thermistor do? (a) makes a beeping sound (b) lets current go one way (c) senses how hot it is (d) is a resistance knob
  29. 29.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) thermistor (d) potentiometer
  30. 30.True or false: a fuse blows if current is high. (a) True (b) False
  31. 31.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  32. 32.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) stores a little charge (d) senses how bright it is
  33. 33.True or false: a motor turns a fan or wheels. (a) True (b) False
  34. 34.True or false: a motor senses how hot it is. (a) True (b) False
  35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
  36. 36.True or false: a diode glows using little power. (a) True (b) False
  37. 37.🧩 Which component blows if current is high? (a) LED (b) resistor (c) fuse (d) capacitor
  38. 38.True or false: a resistor lets current go one way. (a) False (b) True
  39. 39.True or false: a resistor limits the current. (a) False (b) True
  40. 40.True or false: a thermistor senses how hot it is. (a) False (b) True

Answer key

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

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