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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 575 · 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.What does a transistor do? (a) limits the current (b) stores a little charge (c) boosts a small signal (d) senses how hot it is
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  4. 4.What does a thermistor do? (a) makes a beeping sound (b) boosts a small signal (c) senses how hot it is (d) stores a little charge
  5. 5.True or false: a resistor has coloured bands. (a) False (b) True
  6. 6.True or false: a motor turns a fan or wheels. (a) False (b) True
  7. 7.What does a motor do? (a) has coloured bands (b) makes a beeping sound (c) makes things spin (d) glows using little power
  8. 8.What does a diode do? (a) stores a little charge (b) limits the current (c) glows using little power (d) lets current go one way
  9. 9.What does a resistor do? (a) blows if current is high (b) beeps for an alarm (c) boosts a small signal (d) has coloured bands
  10. 10.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) buzzer (d) potentiometer
  11. 11.True or false: a buzzer senses how hot it is. (a) True (b) False
  12. 12.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) LDR (d) fuse
  13. 13.What does a potentiometer do? (a) lets current go one way (b) makes things spin (c) is a resistance knob (d) beeps for an alarm
  14. 14.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) buzzer (d) resistor
  17. 17.True or false: a fuse has coloured bands. (a) True (b) False
  18. 18.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) capacitor (d) LED
  19. 19.True or false: a motor is a resistance knob. (a) True (b) False
  20. 20.True or false: an LDR senses how bright it is. (a) True (b) False
  21. 21.What does a capacitor do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) stores a little charge
  22. 22.True or false: a fuse senses how hot it is. (a) False (b) True
  23. 23.True or false: a buzzer beeps for an alarm. (a) True (b) False
  24. 24.🧩 Which component limits the current? (a) fuse (b) buzzer (c) resistor (d) LDR
  25. 25.What does an LED do? (a) stores a little charge (b) beeps for an alarm (c) senses how bright it is (d) glows using little power
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) LED (d) potentiometer
  28. 28.🧩 Which component turns a fan or wheels? (a) LED (b) resistor (c) fuse (d) motor
  29. 29.True or false: a capacitor boosts a small signal. (a) True (b) False
  30. 30.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  31. 31.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) fuse (d) motor
  32. 32.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) glows using little power (d) has coloured bands
  33. 33.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) resistor (d) fuse
  34. 34.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) diode (d) thermistor
  35. 35.True or false: a fuse makes things spin. (a) True (b) False
  36. 36.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) thermistor (d) LDR
  37. 37.True or false: a capacitor senses how hot it is. (a) False (b) True
  38. 38.True or false: an LDR glows using little power. (a) True (b) False
  39. 39.🧩 Which component lets current go one way? (a) transistor (b) potentiometer (c) buzzer (d) diode
  40. 40.True or false: a transistor boosts a small signal. (a) True (b) False

Answer key

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

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