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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 74 · 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 potentiometer do? (a) makes a beeping sound (b) blows if current is high (c) limits the current (d) is a resistance knob
  2. 2.True or false: a transistor makes things spin. (a) False (b) True
  3. 3.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) senses how hot it is (d) boosts a small signal
  4. 4.🧩 Which component beeps for an alarm? (a) transistor (b) motor (c) LDR (d) buzzer
  5. 5.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) senses how hot it is (d) senses how bright it is
  6. 6.What does a capacitor do? (a) senses how bright it is (b) glows using little power (c) stores a little charge (d) has coloured bands
  7. 7.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) motor (d) capacitor
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  9. 9.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) buzzer (d) resistor
  10. 10.🧩 Which component boosts a small signal? (a) resistor (b) transistor (c) diode (d) buzzer
  11. 11.What does a transistor do? (a) makes things spin (b) boosts a small signal (c) has coloured bands (d) lets current go one way
  12. 12.🧩 Which component limits the current? (a) diode (b) LDR (c) resistor (d) thermistor
  13. 13.True or false: a resistor limits the current. (a) True (b) False
  14. 14.🧩 Which component lets current go one way? (a) LDR (b) capacitor (c) diode (d) buzzer
  15. 15.What does a buzzer do? (a) blows if current is high (b) limits the current (c) turns a fan or wheels (d) makes a beeping sound
  16. 16.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) LDR (d) buzzer
  17. 17.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  19. 19.True or false: a fuse is a resistance knob. (a) False (b) True
  20. 20.True or false: a resistor makes things spin. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) motor (b) resistor (c) transistor (d) LDR
  22. 22.True or false: a thermistor senses how hot it is. (a) False (b) True
  23. 23.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) capacitor (d) resistor
  24. 24.🧩 Which component glows using little power? (a) diode (b) resistor (c) fuse (d) LED
  25. 25.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) makes a beeping sound (d) limits the current
  26. 26.True or false: a resistor turns a fan or wheels. (a) False (b) True
  27. 27.🧩 Which component makes things spin? (a) fuse (b) LDR (c) transistor (d) motor
  28. 28.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) resistor (d) LED
  29. 29.True or false: a thermistor limits the current. (a) True (b) False
  30. 30.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) makes a beeping sound (d) blows if current is high
  31. 31.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) blows if current is high (d) stores a little charge
  32. 32.What does a buzzer do? (a) senses how hot it is (b) stores a little charge (c) beeps for an alarm (d) turns a fan or wheels
  33. 33.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) fuse (d) resistor
  34. 34.True or false: a resistor stores a little charge. (a) False (b) True
  35. 35.🧩 Which component senses how hot it is? (a) motor (b) potentiometer (c) fuse (d) thermistor
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.True or false: a potentiometer glows using little power. (a) False (b) True
  38. 38.🧩 Which component turns a fan or wheels? (a) capacitor (b) potentiometer (c) diode (d) motor
  39. 39.True or false: a resistor has coloured bands. (a) True (b) False
  40. 40.True or false: a diode lets current go one way. (a) False (b) True

Answer key

  1. is a resistance knob
  2. False
  3. turns a fan or wheels
  4. buzzer
  5. makes things spin
  6. stores a little charge
  7. LDR
  8. store charge briefly
  9. capacitor
  10. transistor
  11. boosts a small signal
  12. resistor
  13. True
  14. diode
  15. makes a beeping sound
  16. potentiometer
  17. a motor
  18. a buzzer
  19. False
  20. False
  21. resistor
  22. True
  23. capacitor
  24. LED
  25. smooths a wobbly supply
  26. False
  27. motor
  28. fuse
  29. False
  30. senses how hot it is
  31. senses how bright it is
  32. beeps for an alarm
  33. buzzer
  34. False
  35. thermistor
  36. True
  37. False
  38. motor
  39. True
  40. True

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