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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 614 · 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 resistor has coloured bands. (a) False (b) True
  2. 2.What does a potentiometer do? (a) is a resistance knob (b) smooths a wobbly supply (c) lets current go one way (d) makes a beeping sound
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  4. 4.🧩 Which component has coloured bands? (a) buzzer (b) LED (c) thermistor (d) resistor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  7. 7.True or false: a potentiometer boosts a small signal. (a) True (b) False
  8. 8.True or false: a motor limits the current. (a) False (b) True
  9. 9.What does a resistor do? (a) smooths a wobbly supply (b) has coloured bands (c) lets current go one way (d) is a resistance knob
  10. 10.🧩 Which component senses how bright it is? (a) LED (b) potentiometer (c) LDR (d) diode
  11. 11.What does a motor do? (a) makes things spin (b) limits the current (c) smooths a wobbly supply (d) stores a little charge
  12. 12.True or false: a fuse stores a little charge. (a) True (b) False
  13. 13.True or false: a transistor boosts a small signal. (a) True (b) False
  14. 14.What does an LED do? (a) glows using little power (b) makes things spin (c) is a resistance knob (d) blows if current is high
  15. 15.🧩 Which component lets current go one way? (a) resistor (b) LED (c) capacitor (d) diode
  16. 16.🧩 Which component glows using little power? (a) capacitor (b) fuse (c) LED (d) resistor
  17. 17.🧩 Which component beeps for an alarm? (a) diode (b) LED (c) buzzer (d) LDR
  18. 18.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  19. 19.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) senses how hot it is (d) lets current go one way
  20. 20.🧩 Which component limits the current? (a) motor (b) buzzer (c) resistor (d) LED
  21. 21.🧩 Which component blows if current is high? (a) buzzer (b) LED (c) fuse (d) diode
  22. 22.True or false: a diode is a resistance knob. (a) False (b) True
  23. 23.True or false: a buzzer makes things spin. (a) False (b) True
  24. 24.True or false: an LDR senses how bright it is. (a) True (b) False
  25. 25.What does a thermistor do? (a) is a resistance knob (b) beeps for an alarm (c) senses how hot it is (d) makes things spin
  26. 26.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  27. 27.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  28. 28.🧩 Which component makes a beeping sound? (a) fuse (b) transistor (c) capacitor (d) buzzer
  29. 29.What does a transistor do? (a) has coloured bands (b) limits the current (c) makes a beeping sound (d) boosts a small signal
  30. 30.True or false: a thermistor senses how hot it is. (a) False (b) True
  31. 31.🧩 Which component boosts a small signal? (a) LED (b) resistor (c) fuse (d) transistor
  32. 32.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  33. 33.True or false: a resistor limits the current. (a) False (b) True
  34. 34.What does an LDR do? (a) is a resistance knob (b) has coloured bands (c) turns a fan or wheels (d) senses how bright it is
  35. 35.True or false: an LDR lets current go one way. (a) True (b) False
  36. 36.True or false: an LDR glows using little power. (a) True (b) False
  37. 37.True or false: a buzzer beeps for an alarm. (a) True (b) False
  38. 38.🧩 Which component makes things spin? (a) transistor (b) motor (c) diode (d) potentiometer
  39. 39.True or false: a diode smooths a wobbly supply. (a) True (b) False
  40. 40.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) transistor (d) LDR

Answer key

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

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