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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 430 · 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: an LDR turns a fan or wheels. (a) False (b) True
  2. 2.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) fuse (d) buzzer
  3. 3.What does a diode do? (a) has coloured bands (b) lets current go one way (c) smooths a wobbly supply (d) limits the current
  4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  5. 5.What does a fuse do? (a) limits the current (b) blows if current is high (c) senses how hot it is (d) makes things spin
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  7. 7.🧩 Which component makes things spin? (a) LDR (b) LED (c) potentiometer (d) motor
  8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  9. 9.🧩 Which component is a resistance knob? (a) fuse (b) transistor (c) potentiometer (d) thermistor
  10. 10.What does an LDR do? (a) smooths a wobbly supply (b) makes things spin (c) senses how bright it is (d) limits the current
  11. 11.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) boosts a small signal (d) limits the current
  12. 12.What does a resistor do? (a) boosts a small signal (b) limits the current (c) glows using little power (d) turns a fan or wheels
  13. 13.True or false: an LDR senses how bright it is. (a) True (b) False
  14. 14.🧩 Which component smooths a wobbly supply? (a) LED (b) LDR (c) diode (d) capacitor
  15. 15.True or false: an LED smooths a wobbly supply. (a) True (b) False
  16. 16.What does a capacitor do? (a) senses how hot it is (b) senses how bright it is (c) limits the current (d) stores a little charge
  17. 17.🧩 Which component lets current go one way? (a) resistor (b) transistor (c) fuse (d) diode
  18. 18.True or false: a thermistor has coloured bands. (a) True (b) False
  19. 19.🧩 Which component has coloured bands? (a) diode (b) resistor (c) fuse (d) capacitor
  20. 20.True or false: a thermistor beeps for an alarm. (a) False (b) True
  21. 21.True or false: a transistor boosts a small signal. (a) False (b) True
  22. 22.True or false: a thermistor is a resistance knob. (a) True (b) False
  23. 23.True or false: a fuse senses how hot it is. (a) True (b) False
  24. 24.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) has coloured bands (d) beeps for an alarm
  25. 25.What does a resistor do? (a) turns a fan or wheels (b) has coloured bands (c) is a resistance knob (d) boosts a small signal
  26. 26.🧩 Which component glows using little power? (a) LDR (b) diode (c) LED (d) fuse
  27. 27.What does a buzzer do? (a) has coloured bands (b) senses how bright it is (c) glows using little power (d) beeps for an alarm
  28. 28.True or false: a buzzer beeps for an alarm. (a) True (b) False
  29. 29.What does an LED do? (a) makes things spin (b) glows using little power (c) limits the current (d) smooths a wobbly supply
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.True or false: a capacitor lets current go one way. (a) True (b) False
  32. 32.🧩 Which component makes a beeping sound? (a) fuse (b) transistor (c) buzzer (d) thermistor
  33. 33.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component blows if current is high? (a) thermistor (b) resistor (c) transistor (d) fuse
  35. 35.What does a capacitor do? (a) makes things spin (b) glows using little power (c) smooths a wobbly supply (d) blows if current is high
  36. 36.What does a thermistor do? (a) makes things spin (b) senses how hot it is (c) lets current go one way (d) limits the current
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.True or false: a resistor glows using little power. (a) False (b) True
  39. 39.True or false: a motor turns a fan or wheels. (a) False (b) True
  40. 40.True or false: an LDR is a resistance knob. (a) True (b) False

Answer key

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

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