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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 549 · 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.🧩 Which component senses how hot it is? (a) resistor (b) capacitor (c) diode (d) thermistor
  2. 2.What does an LED do? (a) has coloured bands (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
  3. 3.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) makes things spin (d) beeps for an alarm
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  5. 5.🧩 Which component lets current go one way? (a) potentiometer (b) resistor (c) capacitor (d) diode
  6. 6.True or false: a resistor boosts a small signal. (a) True (b) False
  7. 7.What does a transistor do? (a) glows using little power (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
  8. 8.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) diode (d) buzzer
  9. 9.What does a capacitor do? (a) limits the current (b) stores a little charge (c) has coloured bands (d) turns a fan or wheels
  10. 10.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) senses how bright it is (d) lets current go one way
  11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  12. 12.🧩 Which component smooths a wobbly supply? (a) buzzer (b) transistor (c) diode (d) capacitor
  13. 13.What does a diode do? (a) limits the current (b) smooths a wobbly supply (c) blows if current is high (d) lets current go one way
  14. 14.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  15. 15.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  16. 16.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) buzzer (d) LED
  17. 17.🧩 Which component makes a beeping sound? (a) capacitor (b) fuse (c) buzzer (d) LDR
  18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
  19. 19.What does a buzzer do? (a) has coloured bands (b) smooths a wobbly supply (c) makes things spin (d) makes a beeping sound
  20. 20.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) lets current go one way (d) makes a beeping sound
  21. 21.True or false: a resistor stores a little charge. (a) True (b) False
  22. 22.True or false: an LED glows using little power. (a) False (b) True
  23. 23.True or false: a capacitor stores a little charge. (a) False (b) True
  24. 24.True or false: a potentiometer is a resistance knob. (a) False (b) True
  25. 25.True or false: a motor has coloured bands. (a) True (b) False
  26. 26.True or false: a motor limits the current. (a) True (b) False
  27. 27.🧩 Which component blows if current is high? (a) motor (b) potentiometer (c) fuse (d) resistor
  28. 28.🧩 Which component boosts a small signal? (a) resistor (b) potentiometer (c) transistor (d) LED
  29. 29.🧩 Which component turns a fan or wheels? (a) diode (b) resistor (c) motor (d) potentiometer
  30. 30.True or false: a resistor limits the current. (a) True (b) False
  31. 31.🧩 Which component has coloured bands? (a) resistor (b) motor (c) LDR (d) buzzer
  32. 32.True or false: a transistor beeps for an alarm. (a) True (b) False
  33. 33.What does an LDR do? (a) glows using little power (b) smooths a wobbly supply (c) senses how bright it is (d) is a resistance knob
  34. 34.True or false: a transistor is a resistance knob. (a) True (b) False
  35. 35.True or false: a motor turns a fan or wheels. (a) False (b) True
  36. 36.What does a fuse do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) blows if current is high
  37. 37.True or false: a buzzer makes a beeping sound. (a) True (b) False
  38. 38.True or false: a fuse glows using little power. (a) False (b) True
  39. 39.🧩 Which component senses how bright it is? (a) transistor (b) fuse (c) capacitor (d) LDR
  40. 40.True or false: a diode blows if current is high. (a) True (b) False

Answer key

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

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