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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 321 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  2. 2.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) diode (d) LED
  3. 3.True or false: a transistor has coloured bands. (a) False (b) True
  4. 4.What does a thermistor do? (a) lets current go one way (b) is a resistance knob (c) senses how hot it is (d) has coloured bands
  5. 5.🧩 Which component senses how bright it is? (a) fuse (b) diode (c) transistor (d) LDR
  6. 6.🧩 Which component is a resistance knob? (a) transistor (b) buzzer (c) potentiometer (d) motor
  7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) capacitor (d) thermistor
  8. 8.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  10. 10.What does a motor do? (a) limits the current (b) beeps for an alarm (c) turns a fan or wheels (d) senses how bright it is
  11. 11.True or false: a resistor limits the current. (a) True (b) False
  12. 12.What does an LED do? (a) is a resistance knob (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
  13. 13.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) beeps for an alarm (d) smooths a wobbly supply
  14. 14.True or false: an LED senses how hot it is. (a) True (b) False
  15. 15.What does a capacitor do? (a) makes things spin (b) blows if current is high (c) makes a beeping sound (d) stores a little charge
  16. 16.🧩 Which component boosts a small signal? (a) capacitor (b) motor (c) transistor (d) LDR
  17. 17.True or false: a potentiometer is a resistance knob. (a) False (b) True
  18. 18.🧩 Which component limits the current? (a) resistor (b) capacitor (c) LED (d) fuse
  19. 19.🧩 Which component makes things spin? (a) buzzer (b) capacitor (c) fuse (d) motor
  20. 20.True or false: a motor limits the current. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) capacitor (d) buzzer
  22. 22.What does a potentiometer do? (a) glows using little power (b) has coloured bands (c) blows if current is high (d) is a resistance knob
  23. 23.True or false: a motor boosts a small signal. (a) False (b) True
  24. 24.What does an LDR do? (a) limits the current (b) has coloured bands (c) makes a beeping sound (d) senses how bright it is
  25. 25.True or false: an LDR senses how bright it is. (a) True (b) False
  26. 26.True or false: an LED lets current go one way. (a) True (b) False
  27. 27.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how hot it is (d) makes a beeping sound
  28. 28.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) diode (d) transistor
  29. 29.True or false: a thermistor senses how hot it is. (a) True (b) False
  30. 30.True or false: a thermistor is a resistance knob. (a) True (b) False
  31. 31.True or false: a fuse blows if current is high. (a) False (b) True
  32. 32.True or false: a diode stores a little charge. (a) True (b) False
  33. 33.What does a motor do? (a) makes things spin (b) blows if current is high (c) makes a beeping sound (d) glows using little power
  34. 34.What does a resistor do? (a) senses how hot it is (b) makes things spin (c) has coloured bands (d) blows if current is high
  35. 35.True or false: a transistor is a resistance knob. (a) False (b) True
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.What does a transistor do? (a) makes a beeping sound (b) stores a little charge (c) boosts a small signal (d) senses how bright it is
  39. 39.True or false: a motor has coloured bands. (a) False (b) True
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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