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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 300 · 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: a potentiometer senses how hot it is. (a) True (b) False
  2. 2.🧩 Which component senses how hot it is? (a) capacitor (b) transistor (c) fuse (d) thermistor
  3. 3.What does a fuse do? (a) blows if current is high (b) makes things spin (c) stores a little charge (d) glows using little power
  4. 4.True or false: a thermistor senses how hot it is. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  6. 6.What does a potentiometer do? (a) beeps for an alarm (b) is a resistance knob (c) makes a beeping sound (d) smooths a wobbly supply
  7. 7.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) fuse (d) buzzer
  8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  9. 9.🧩 Which component has coloured bands? (a) LDR (b) LED (c) capacitor (d) resistor
  10. 10.What does a resistor do? (a) smooths a wobbly supply (b) has coloured bands (c) is a resistance knob (d) senses how hot it is
  11. 11.What does a motor do? (a) senses how hot it is (b) beeps for an alarm (c) makes things spin (d) senses how bright it is
  12. 12.🧩 Which component turns a fan or wheels? (a) diode (b) resistor (c) LDR (d) motor
  13. 13.What does a capacitor do? (a) blows if current is high (b) has coloured bands (c) stores a little charge (d) makes things spin
  14. 14.True or false: an LDR limits the current. (a) False (b) True
  15. 15.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  16. 16.🧩 Which component glows using little power? (a) resistor (b) fuse (c) motor (d) LED
  17. 17.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) capacitor (d) transistor
  18. 18.True or false: a thermistor senses how bright it is. (a) False (b) True
  19. 19.True or false: a thermistor makes things spin. (a) True (b) False
  20. 20.What does an LED do? (a) turns a fan or wheels (b) senses how hot it is (c) smooths a wobbly supply (d) glows using little power
  21. 21.What does a thermistor do? (a) stores a little charge (b) senses how bright it is (c) senses how hot it is (d) smooths a wobbly supply
  22. 22.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) glows using little power (d) senses how bright it is
  23. 23.True or false: a potentiometer is a resistance knob. (a) True (b) False
  24. 24.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) resistor (d) LDR
  25. 25.What does a diode do? (a) glows using little power (b) lets current go one way (c) is a resistance knob (d) boosts a small signal
  26. 26.True or false: a resistor limits the current. (a) True (b) False
  27. 27.True or false: an LED boosts a small signal. (a) False (b) True
  28. 28.🧩 Which component senses how bright it is? (a) resistor (b) potentiometer (c) fuse (d) LDR
  29. 29.What does a transistor do? (a) turns a fan or wheels (b) senses how hot it is (c) boosts a small signal (d) smooths a wobbly supply
  30. 30.🧩 Which component blows if current is high? (a) LED (b) motor (c) capacitor (d) fuse
  31. 31.True or false: an LDR blows if current is high. (a) True (b) False
  32. 32.True or false: a buzzer beeps for an alarm. (a) False (b) True
  33. 33.🧩 Which component limits the current? (a) LED (b) resistor (c) LDR (d) capacitor
  34. 34.True or false: a transistor boosts a small signal. (a) True (b) False
  35. 35.True or false: an LDR glows using little power. (a) False (b) True
  36. 36.True or false: a resistor has coloured bands. (a) False (b) True
  37. 37.True or false: a resistor stores a little charge. (a) False (b) True
  38. 38.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  39. 39.What does an LDR do? (a) stores a little charge (b) senses how bright it is (c) beeps for an alarm (d) smooths a wobbly supply
  40. 40.What does a resistor do? (a) boosts a small signal (b) glows using little power (c) stores a little charge (d) limits the current

Answer key

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

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