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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 360 · 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) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  2. 2.What does a buzzer do? (a) glows using little power (b) smooths a wobbly supply (c) beeps for an alarm (d) lets current go one way
  3. 3.True or false: an LDR senses how bright it is. (a) True (b) False
  4. 4.What does a diode do? (a) senses how hot it is (b) has coloured bands (c) is a resistance knob (d) lets current go one way
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  6. 6.🧩 Which component has coloured bands? (a) resistor (b) diode (c) LED (d) transistor
  7. 7.🧩 Which component stores a little charge? (a) fuse (b) diode (c) LDR (d) capacitor
  8. 8.🧩 Which component is a resistance knob? (a) LDR (b) resistor (c) transistor (d) potentiometer
  9. 9.🧩 Which component lets current go one way? (a) potentiometer (b) capacitor (c) buzzer (d) diode
  10. 10.What does an LDR do? (a) glows using little power (b) turns a fan or wheels (c) is a resistance knob (d) senses how bright it is
  11. 11.🧩 Which component makes things spin? (a) motor (b) buzzer (c) resistor (d) diode
  12. 12.What does a resistor do? (a) stores a little charge (b) makes a beeping sound (c) smooths a wobbly supply (d) has coloured bands
  13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  14. 14.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) senses how hot it is (d) blows if current is high
  15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
  16. 16.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) limits the current (d) stores a little charge
  17. 17.🧩 Which component limits the current? (a) LDR (b) resistor (c) thermistor (d) potentiometer
  18. 18.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) is a resistance knob
  19. 19.🧩 Which component boosts a small signal? (a) LDR (b) resistor (c) transistor (d) LED
  20. 20.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes a beeping sound (d) lets current go one way
  21. 21.What does a fuse do? (a) is a resistance knob (b) stores a little charge (c) glows using little power (d) blows if current is high
  22. 22.True or false: a thermistor makes a beeping sound. (a) False (b) True
  23. 23.True or false: an LDR blows if current is high. (a) True (b) False
  24. 24.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) potentiometer (d) buzzer
  25. 25.True or false: a resistor beeps for an alarm. (a) True (b) False
  26. 26.True or false: a buzzer senses how hot it is. (a) False (b) True
  27. 27.True or false: a resistor senses how bright it is. (a) False (b) True
  28. 28.True or false: a thermistor makes things spin. (a) False (b) True
  29. 29.What does a potentiometer do? (a) lets current go one way (b) senses how hot it is (c) senses how bright it is (d) is a resistance knob
  30. 30.True or false: an LDR boosts a small signal. (a) False (b) True
  31. 31.True or false: an LDR is a resistance knob. (a) True (b) False
  32. 32.True or false: a resistor has coloured bands. (a) False (b) True
  33. 33.True or false: a resistor limits the current. (a) True (b) False
  34. 34.True or false: a motor turns a fan or wheels. (a) True (b) False
  35. 35.True or false: an LED smooths a wobbly supply. (a) False (b) True
  36. 36.🧩 Which component blows if current is high? (a) LED (b) fuse (c) buzzer (d) motor
  37. 37.🧩 Which component is a resistance knob? (a) LED (b) thermistor (c) resistor (d) potentiometer
  38. 38.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  39. 39.True or false: an LED glows using little power. (a) False (b) True
  40. 40.🧩 Which component senses how bright it is? (a) buzzer (b) fuse (c) resistor (d) LDR

Answer key

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

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