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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 141 · 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.What does a fuse do? (a) senses how hot it is (b) has coloured bands (c) stores a little charge (d) blows if current is high
  2. 2.True or false: a thermistor blows if current is high. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  4. 4.True or false: a fuse limits the current. (a) True (b) False
  5. 5.What does a resistor do? (a) glows using little power (b) stores a little charge (c) is a resistance knob (d) limits the current
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  7. 7.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) LDR (d) fuse
  8. 8.🧩 Which component senses how bright it is? (a) potentiometer (b) motor (c) LED (d) LDR
  9. 9.🧩 Which component lets current go one way? (a) LED (b) LDR (c) potentiometer (d) diode
  10. 10.🧩 Which component makes a beeping sound? (a) thermistor (b) fuse (c) resistor (d) buzzer
  11. 11.🧩 Which component is a resistance knob? (a) resistor (b) LDR (c) potentiometer (d) LED
  12. 12.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) makes a beeping sound (d) stores a little charge
  13. 13.True or false: an LDR has coloured bands. (a) True (b) False
  14. 14.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) resistor (d) fuse
  15. 15.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) potentiometer (d) motor
  16. 16.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  17. 17.🧩 Which component limits the current? (a) resistor (b) fuse (c) potentiometer (d) thermistor
  18. 18.What does a capacitor do? (a) smooths a wobbly supply (b) lets current go one way (c) makes a beeping sound (d) blows if current is high
  19. 19.🧩 Which component boosts a small signal? (a) fuse (b) LDR (c) transistor (d) motor
  20. 20.True or false: a diode boosts a small signal. (a) False (b) True
  21. 21.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) resistor (d) LED
  22. 22.True or false: a buzzer makes things spin. (a) True (b) False
  23. 23.True or false: a fuse blows if current is high. (a) False (b) True
  24. 24.True or false: a capacitor limits the current. (a) True (b) False
  25. 25.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) limits the current (d) lets current go one way
  26. 26.True or false: a capacitor stores a little charge. (a) False (b) True
  27. 27.True or false: an LDR senses how bright it is. (a) True (b) False
  28. 28.What does a potentiometer do? (a) smooths a wobbly supply (b) beeps for an alarm (c) stores a little charge (d) is a resistance knob
  29. 29.What does a diode do? (a) beeps for an alarm (b) turns a fan or wheels (c) lets current go one way (d) blows if current is high
  30. 30.True or false: a transistor is a resistance knob. (a) False (b) True
  31. 31.True or false: a fuse senses how hot it is. (a) False (b) True
  32. 32.True or false: a transistor boosts a small signal. (a) False (b) True
  33. 33.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) is a resistance knob (d) glows using little power
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
  36. 36.True or false: a motor turns a fan or wheels. (a) False (b) True
  37. 37.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LDR (d) transistor
  38. 38.True or false: a capacitor has coloured bands. (a) True (b) False
  39. 39.What does a capacitor do? (a) senses how hot it is (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  40. 40.🧩 Which component makes things spin? (a) transistor (b) resistor (c) motor (d) LDR

Answer key

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

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