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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 701 · 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) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  2. 2.True or false: an LED glows using little power. (a) False (b) True
  3. 3.What does a diode do? (a) turns a fan or wheels (b) blows if current is high (c) beeps for an alarm (d) lets current go one way
  4. 4.🧩 Which component smooths a wobbly supply? (a) LED (b) diode (c) capacitor (d) transistor
  5. 5.What does a thermistor do? (a) makes a beeping sound (b) beeps for an alarm (c) has coloured bands (d) senses how hot it is
  6. 6.What does a capacitor do? (a) has coloured bands (b) blows if current is high (c) smooths a wobbly supply (d) makes things spin
  7. 7.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  8. 8.What does a motor do? (a) stores a little charge (b) makes a beeping sound (c) senses how bright it is (d) makes things spin
  9. 9.True or false: a resistor lets current go one way. (a) False (b) True
  10. 10.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  11. 11.True or false: a transistor boosts a small signal. (a) False (b) True
  12. 12.What does a fuse do? (a) is a resistance knob (b) makes things spin (c) blows if current is high (d) beeps for an alarm
  13. 13.True or false: a diode lets current go one way. (a) False (b) True
  14. 14.🧩 Which component is a resistance knob? (a) diode (b) resistor (c) transistor (d) potentiometer
  15. 15.What does an LDR do? (a) makes a beeping sound (b) glows using little power (c) turns a fan or wheels (d) senses how bright it is
  16. 16.True or false: an LDR makes a beeping sound. (a) False (b) True
  17. 17.What does an LED do? (a) senses how bright it is (b) makes things spin (c) glows using little power (d) turns a fan or wheels
  18. 18.True or false: a thermistor senses how hot it is. (a) False (b) True
  19. 19.True or false: a resistor limits the current. (a) False (b) True
  20. 20.True or false: an LDR senses how bright it is. (a) False (b) True
  21. 21.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  22. 22.True or false: a diode limits the current. (a) True (b) False
  23. 23.True or false: a resistor has coloured bands. (a) False (b) True
  24. 24.🧩 Which component senses how hot it is? (a) fuse (b) resistor (c) potentiometer (d) thermistor
  25. 25.🧩 Which component glows using little power? (a) transistor (b) thermistor (c) diode (d) LED
  26. 26.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) potentiometer (d) LED
  27. 27.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) diode (d) capacitor
  28. 28.True or false: a potentiometer is a resistance knob. (a) False (b) True
  29. 29.What does a buzzer do? (a) blows if current is high (b) makes a beeping sound (c) glows using little power (d) lets current go one way
  30. 30.True or false: a thermistor stores a little charge. (a) False (b) True
  31. 31.True or false: a diode blows if current is high. (a) True (b) False
  32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
  33. 33.What does a motor do? (a) beeps for an alarm (b) senses how hot it is (c) turns a fan or wheels (d) limits the current
  34. 34.True or false: a motor makes things spin. (a) True (b) False
  35. 35.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) LDR (d) diode
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.What does a resistor do? (a) is a resistance knob (b) has coloured bands (c) glows using little power (d) stores a little charge
  38. 38.🧩 Which component makes things spin? (a) resistor (b) transistor (c) motor (d) diode
  39. 39.What does a transistor do? (a) stores a little charge (b) senses how hot it is (c) smooths a wobbly supply (d) boosts a small signal
  40. 40.True or false: a resistor is a resistance knob. (a) True (b) False

Answer key

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

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