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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 530 · 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 part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  2. 2.🧩 Which component makes things spin? (a) buzzer (b) capacitor (c) resistor (d) motor
  3. 3.🧩 Which component makes a beeping sound? (a) LED (b) LDR (c) fuse (d) buzzer
  4. 4.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  5. 5.🧩 Which component has coloured bands? (a) LED (b) resistor (c) capacitor (d) fuse
  6. 6.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) motor (d) transistor
  7. 7.True or false: a potentiometer is a resistance knob. (a) False (b) True
  8. 8.What does a fuse do? (a) limits the current (b) smooths a wobbly supply (c) senses how hot it is (d) blows if current is high
  9. 9.What does a capacitor do? (a) glows using little power (b) has coloured bands (c) senses how hot it is (d) smooths a wobbly supply
  10. 10.True or false: a resistor lets current go one way. (a) False (b) True
  11. 11.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) diode (d) LED
  13. 13.What does a thermistor do? (a) lets current go one way (b) smooths a wobbly supply (c) senses how hot it is (d) blows if current is high
  14. 14.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  15. 15.What does a potentiometer do? (a) smooths a wobbly supply (b) stores a little charge (c) is a resistance knob (d) limits the current
  16. 16.True or false: a capacitor stores a little charge. (a) False (b) True
  17. 17.True or false: a resistor senses how bright it is. (a) True (b) False
  18. 18.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) diode (d) LED
  19. 19.What does a motor do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) turns a fan or wheels
  20. 20.True or false: a thermistor senses how hot it is. (a) True (b) False
  21. 21.🧩 Which component glows using little power? (a) capacitor (b) motor (c) resistor (d) LED
  22. 22.What does a capacitor do? (a) stores a little charge (b) makes things spin (c) has coloured bands (d) boosts a small signal
  23. 23.True or false: a transistor boosts a small signal. (a) True (b) False
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.True or false: a buzzer stores a little charge. (a) True (b) False
  26. 26.🧩 Which component blows if current is high? (a) LDR (b) buzzer (c) transistor (d) fuse
  27. 27.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) senses how bright it is (d) has coloured bands
  28. 28.True or false: a resistor has coloured bands. (a) True (b) False
  29. 29.True or false: a resistor beeps for an alarm. (a) False (b) True
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
  32. 32.What does a resistor do? (a) is a resistance knob (b) senses how hot it is (c) makes things spin (d) limits the current
  33. 33.🧩 Which component limits the current? (a) resistor (b) fuse (c) thermistor (d) transistor
  34. 34.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) LED (d) potentiometer
  35. 35.What does an LED do? (a) senses how hot it is (b) limits the current (c) glows using little power (d) boosts a small signal
  36. 36.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  37. 37.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) motor (d) LDR
  38. 38.True or false: an LED glows using little power. (a) False (b) True
  39. 39.🧩 Which component turns a fan or wheels? (a) potentiometer (b) LED (c) resistor (d) motor
  40. 40.True or false: a capacitor senses how bright it is. (a) True (b) False

Answer key

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

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